Children’s brains can’t develop properly_______ they lack protein(蛋白質(zhì)).

  A. when  B. since  C. because  D. unless

選A。


解析:

本題考查when的一個(gè)特殊用法。在本題中的when引導(dǎo)的是一個(gè)條件狀語從句,相當(dāng)于if。整個(gè)句子的意思是:如果孩子缺少蛋白質(zhì)

練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:英語教研室 題型:054

Of course, the main difference on the Chinese dinner table is chopsticks instead of knife and fork, but that’s only superficial(表面上的).    1    , in good restaurants, you can always ask for a pair of knife and fork,    2    you find the chopsticks not helpful    3    . The real difference is    4    in the West, you have your own plate of food,    5    in China the dishes are placed on the table and everyone   6    . If you are being   7   to a formal dinner and particularly if the host thinks you’re in the country for the first time, he will do the best to give you a   8   of many different types of dishes. The meal usually   9   with a set of at least four cold dishes, to be   10    by the main courses of hot meat and vegetable dishes. Soup then will be   11    (unless in Guangdong style restaurants)to be followed by staple food(主食)ranging from rice, noodles    12    dumplings. If you wish to have your rice to    13   with other dishes, you should say so in good time, for most of the Chinese   14

to have the staple food at last or have   15   of them at all.

Perhaps one of the things that   16   a Western visitor most is that some of the Chinese hosts like to put food into the plates of their    17    . In formal dinners, there are always “public” chopsticks and spoons for this purpose, but some hosts   18   use their own chopsticks. This is a sign of true friendship and politeness. It is   19    polite to eat the food. If you do not eat it, just   20   the food in the plate.

1. A. Besides                            B. Instead

C. But                               D. Therefore

2. A. though                           B. for

C. if                                  D. unless

3. A. enough                            B. too

C. much                              D. yet

4. A. because                           B. what

C. whether                               D. that

5. A. when                             B. though

C. however                            D. while

6. A. enjoys                           B. shares

C. has                               D. takes

7. A. treated                             B. received

C. accepted                           D. carried

8. A. smell                             B. look

C. sign                                D. taste

9. A. deals                             B. does

C. begins                             D. comes

10. A. followed                          B. eaten

C. treated                                 D. taken

11. A. carried                           B. brought

C. served                             D. sent

12. A. and                              B. of

C. till                                 D. to

13. A. go                             B. do

C. come                              D. serve

14. A. offer                            B. choose

C. fail                                D. manage

15. A. all                              B. neither

C. none                               D. both

16. A. surprises                          B. frightens

C. interests                            D. pleases

17. A. own                            B. children

C. guests                             D. foreigners

18. A. may                      ;       B. must

C. should                               D. would

19. A. always                           B. never

C. usually                              D. often

20. A. put                                 B. leave

C. remain                                 D. keep

 

查看答案和解析>>

科目:高中英語 來源: 題型:054

Of course, the main difference on the Chinese dinner table is chopsticks instead of knife and fork, but that’s only superficial(表面上的).    1    , in good restaurants, you can always ask for a pair of knife and fork,    2    you find the chopsticks not helpful    3    . The real difference is    4    in the West, you have your own plate of food,    5    in China the dishes are placed on the table and everyone   6    . If you are being   7   to a formal dinner and particularly if the host thinks you’re in the country for the first time, he will do the best to give you a   8   of many different types of dishes. The meal usually   9   with a set of at least four cold dishes, to be   10    by the main courses of hot meat and vegetable dishes. Soup then will be   11    (unless in Guangdong style restaurants)to be followed by staple food(主食)ranging from rice, noodles    12    dumplings. If you wish to have your rice to    13   with other dishes, you should say so in good time, for most of the Chinese   14

to have the staple food at last or have   15   of them at all.

Perhaps one of the things that   16   a Western visitor most is that some of the Chinese hosts like to put food into the plates of their    17    . In formal dinners, there are always “public” chopsticks and spoons for this purpose, but some hosts   18   use their own chopsticks. This is a sign of true friendship and politeness. It is   19    polite to eat the food. If you do not eat it, just   20   the food in the plate.

1. A. Besides                            B. Instead

C. But                               D. Therefore

2. A. though                           B. for

C. if                                  D. unless

3. A. enough                            B. too

C. much                              D. yet

4. A. because                           B. what

C. whether                               D. that

5. A. when                             B. though

C. however                            D. while

6. A. enjoys                           B. shares

C. has                               D. takes

7. A. treated                           B. received

C. accepted                           D. carried

8. A. smell                             B. look

C. sign                                D. taste

9. A. deals                             B. does

C. begins                             D. comes

10. A. followed                          B. eaten

C. treated                                 D. taken

11. A. carried                           B. brought

C. served                             D. sent

12. A. and                              B. of

C. till                                 D. to

13. A. go                             B. do

C. come                              D. serve

14. A. offer                            B. choose

C. fail                                D. manage

15. A. all                              B. neither

C. none                               D. both

16. A. surprises                          B. frightens

C. interests                            D. pleases

17. A. own                            B. children

C. guests                             D. foreigners

18. A. may                             B. must

C. should                               D. would

19. A. always                           B. never

C. usually                              D. often

20. A. put                                 B. leave

C. remain                                 D. keep

 

查看答案和解析>>

科目:高中英語 來源: 題型:054

Some air companies give small presents to their passengers. One day a businessman was   1   in an aeroplane,   2   he remembered that he had promised to get some toy wings(飛機(jī)駕駛合格徽章), like the ones which   3   wear, for his children. When the air-hostess came round to ask each passenger whether he wanted something to   4   before supper, the businessman asked her whether she had   5   of the toy wings. “  6  , sir, ”she answered. “I’m going to bring the passengers their supper soon, but   7   that, I’ll bring you the wings. ”

Although it was a stormy day, the businessman   8   his supper, but he noticed that the man in the   9   in front of him was feeling   10   and that he didn’t eat any of his supper. The businessman felt sorry for him. After the passengers had   11   supper, the air-hostess came and took their trays(盤子) away and then she   12   the wings for the businessman's children, so she went to the box which the presents were   13   in and took some out. But she had forgotten   14   passenger had asked for the wings. She knew in which   15   of the plane he was, but she thought that   16   was the man in front of the businessman, the   17   man who was feeling sick. The air-hostess now   18   at the man’s seat and asked him whether he was the gentleman who had wanted the wings. The man looked up at her with   19   eyes. Then he looked out of the window at the threatening clouds which   20    the aeroplane and said, “No, I did not ask for wings. Are you going to need them?”

1. A. serving                            B. thinking

C. travelling                         D. reading

2. A. suddenly                          B. then

C finally                                  D. when

3. A. pilots                             B. air-hostess

C. drivers                           D. astronauts

4. A. eat                              B. introduce

C. drink                             D. choose

5. A. some                             B. few

C. many                               D. any

6. A. No                              B. Yes

C. Oh                              D. Pardon

7. A. expect                           B. besides

C. after                                   D. including

8. A. enjoyed                            B. cooled

C. bought                            D. prepared

9. A. stool                              B. sofa

C. bench                            D. seat

10. A. angry                           B. nervous

C. ill                               D. anxious

11. A. finished                          B. completed

C. solved                            D. passed

12. A. forgot                            B. brought

C. remembered                        D. thought

13. A. hid                                   B. kept

C. piled                            D. held

14. A. what                            B. which

C. whose                           D. where

15. A. beds                            B. seat

C. body                            D. part

16. A. it                               B. that

C. he                               D. this

17. A. poor                            B. ill

C. bad                              D. shy

18. A. turned                            B. arrived

C. cheered                          D. started

19. A. kind                             B. funny

C. satisfied                              D. frightened

20. A. covered                              B. prevented

C. surrounded                       D. delayed

 

查看答案和解析>>

科目:高中英語 來源: 題型:054

Can you imagine what Edison’s life was like in the years after he had invented the electric lamp? Many things had to be   1   and built before electric lamps could   2   be used by all: machines to measure the electricity each home or office used; things to make it   3   that the electricity in the wires did not   4  fires, things to send electricity  5   the right places.

Everything that was   6   had to be thought   7   and built by Edison and the men  8   worked with him. There was no places where they could buy the things they needed. Edison made   9   inventions in order to send electric power to   10   it was wanted.

Edison directed all the work himself: testing new machines, putting wires  11   ground ;fixing lights, and so on. He  12   to be everywhere or the same time. He wanted his men   13   as much work as he did. But he never asked them to do things he  14   would not or could not do.

He had never thought much about   15   hours for sleep; now he often completely   16   sleeping. He slept for  17   minutes at a time, in the middle of the night, in an underground room   18   the power station, with a metal box for his bed. During these days, he almost never saw his wife and their children.

Everyone probably   19  him. Edison won his success when his work was completed. However, he almost did not notice the money and honor he received  20   soon he became interested in other ideas.

1. A. started                           B. stored

C. spent                              D. invented

2. A. have                              B. not

C. quickly                             D. really

3. A. easy                                   B. work

C. certain                                   D. so

4. A. begin                              B. start

C. put                               D. like

5. A. at                                B. on

C. by                                D. to

6. A. needed                           B. accepted

C. tried                                D. obtained

7. A. of                               B. it

C. at                                      D. fast

8. A. which                            B. who

C. have                               D. what

9. A. much                            B. more

C. less                               D. least

10. A. whoever                         B. whatever

C. wherever                           D. whenever

11. A. below                            B. on

C. under                              D. within

12. A. seemed                          B. looked

C. thought                             D. worked

13. A. to do                           B. doing

C. did                                D. done

14. A. oneself                           B. themselves

C. itself                               D. himself

15. A. little                             B. full

C. all                                 D. regular

16. A. forgot                            B. remembered

C. thought                             D. wanted

17. A. few                             B. a few

C. little                                D. a little

18. A. above                            B. from

C. on                                D. at

19. A. begged                           B. respected

C. wondered                            D. liked

20. A. as                              B. so

C. but                               D. because

 

查看答案和解析>>

科目:高中英語 來源:英語教研室 題型:054

Can you imagine what Edison’s life was like in the years after he had invented the electric lamp? Many things had to be   1   and built before electric lamps could   2   be used by all: machines to measure the electricity each home or office used; things to make it   3   that the electricity in the wires did not   4  fires, things to send electricity  5   the right places.

Everything that was   6   had to be thought   7   and built by Edison and the men  8   worked with him. There was no places where they could buy the things they needed. Edison made   9   inventions in order to send electric power to   10   it was wanted.

Edison directed all the work himself: testing new machines, putting wires  11   ground ;fixing lights, and so on. He  12   to be everywhere or the same time. He wanted his men   13   as much work as he did. But he never asked them to do things he  14   would not or could not do.

He had never thought much about   15   hours for sleep; now he often completely   16   sleeping. He slept for  17   minutes at a time, in the middle of the night, in an underground room   18   the power station, with a metal box for his bed. During these days, he almost never saw his wife and their children.

Everyone probably   19  him. Edison won his success when his work was completed. However, he almost did not notice the money and honor he received  20   soon he became interested in other ideas.

1. A. started                           B. stored

C. spent                              D. invented

2. A. have                              B. not

C. quickly                             D. really

3. A. easy                                   B. work

C. certain                                   D. so

4. A. begin                              B. start

C. put                               D. like

5. A. at                                B. on

C. by                                D. to

6. A. needed                           B. accepted

C. tried                          &nbs7p;     D. obtained

7. A. of                               B. it

C. at                                      D. fast

8. A. which                            B. who

C. have                               D. what

9. A. much                            B. more

C. less                               D. least

10. A. whoever                         B. whatever

C. wherever                           D. whenever

11. A. below                            B. on

C. under                              D. within

12. A. seemed                          B. looked

C. thought                             D. worked

13. A. to do                           B. doing

C. did                                D. done

14. A. oneself                           B. themselves

C. itself                               D. himself

15. A. little                             B. full

C. all                                 D. regular

16. A. forgot                            B. remembered

C. thought                             D. wanted

17. A. few                             B. a few

C. little                                D. a little

18. A. above                            B. from

C. on                                D. at

19. A. begged                           B. respected

C. wondered                            D. liked

20. A. as                              B. so

C. but                               D. because

 

查看答案和解析>>

同步練習(xí)冊答案