At the beginning of this century, medical scientists made an interesting discovery: we are built not just of flesh(肌肉) and blood but also of time. They were   21   to show that we all have a ‘body clock’   22   us, which controls the   23   and fall of our body energies,   24   us different from one day to the next.

The   25   of a ‘body clock’ should not be too   26   since the lives of most living things are controlled   27   the 24-hour night-and-day cycle(循環(huán)). We feel   28   and fall asleep at night and become  29   and energetic during the day. If the 24-hour cycle is   30   most people experience unpleasant   31  . For example, people who are not   32   to working at night can find that   33   of sleep causes them to   34   badly at work.

  35   the daily cycle of sleeping and   36  , we also have other cycles which   37   longer than one day. Most of us would   38   that we feel good on some days and not so good on  39  ; sometimes our ideas seem to flow and at other times, they   40   do not exist.

1.  

A. anxious            B. careful            C. able           D. proud

2.  

A. around            B. inside           C. between         D. on

3.  

 A. rise              B. supply           C. use              D. movement

4.

A. showing            B. treating       C. changing          D. making

5.

 A. idea              B. opinion        C. story              D. invention

6.

A. difficult        B. exciting         C. interesting        D. surprising

7.

 A. from              B. over           C. by                 D. during

8.

A. dull               B. dreamy         C. tired              D. peaceful

9.

A. regular            B. excited        C. clear              D. lively

10.

A. shortened          B. disturbed      C. reset              D. troubled

11.

A. moments            B. senses         C. feelings         D. effects

12.

A. used               B. allowed        C. expected         D. prevented

13.

A. miss              B. none            C. need             D. lack

14.

A. show              B. perform         C. manage            D. control

15.

A. With               B. Except         C. As well as         D. Rather than

16.

A. waking             B. moving         C. living             D. working

17.

A. repeat             B. remain         C. happen              D. last

18.

A. believe            B. agree          C. realize            D. allow

19.

A. others             B. the other          C. all other          D. other

20.

A. only              B. just               C. still              D. yet

 

 

【答案】

 

1.C           

2.B

3.A

4.D

5.A

6.D

7.C

8.C

9.D           

10.B

11.C

12.A

13.D

14.B

15.C

16.A

17.D          

18.B

19.A

20.B

【解析】 略

 

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