What is in the drug that makes you sick or dead? For example, cocaine is harmful, but what makes it harmful?

   I can’t tell you all about drugs, but I can ___36___ you think about them in this ____37____ way. Your body is a very complicated machine, ____38____ a lot of chemical machinery, all of which is finally turned ____39____ it all works together. Special chemicals, which we call drugs, can affect it in many different ways.

   Some drugs are ____40____ when your body has a problem, as with disease—causing bacteria. Then someone may give you aspirin to keep your temperature from going too ____41____ or some penicillin (青霉素) ____42____ it stops the growth of some kinds of bacteria. ___43_____, all drugs are really poison, ____44_____ if you take too much, so you must always use them ____45____.

   Why do some people take drugs like cocaine? For a little while they seem to make you feel better, or happier. But ____46____ their effects have ____47____, your body has to pay an extra ____48____ to get back to normal. That makes you want to get ____49____ of the drug.

   Drugs like cocaine have their special effects because they act as ____50____ for your nervous system. They cut off some of your nerve pathways and take away some of your senses and your ____51___. They make you want always more. And just a little too much can even ____52____ nerves to your heart and stop its beating

   Many of us worry about the ____53____ around us and what pollution does to us. How about your internal environment and what goes on ____54____ you? You control that all by yourself in what you put into your ____55_____. Most drugs are pollutants. You would not want pollutants in the air and water around you. Why would you want pollutants in your body?

36.

A.

make

B.

cause

C.

help

D.

let

37.

A.

funny

B.

different

C.

simple

D.

true

38.

A.

just

B.

really

C.

especially

D.

sometimes

39.

A.

as if

B

even if

C.

where

D.

so that

40.

A.

powerful

B.

helpful

C.

painful

D.

helpless

41.

A.

high

B.

tall

C.

much

D.

hot

42.

A.

when

B.

until

C.

as

D.

before

43.

A.

besides

B.

thus

C.

however

D.

naturally

44.

A.

at most

B.

at least

C.

at times

D.

at first

45.

A.

carefully

B.

easily

C.

carelessly

D.

a lot

46.

A.

where

B.

before

C.

after

D.

until

47.

A.

worked

B.

worn

C.

appeared

D.

lost

48.

A.

number

B.

quantity

C.

amount

D.

price

49.

A.

Some more

B.

nothing

C.

a little

D.

a few

50.

A.

guards

B.

medicine

C.

chemicals

D.

poisons

51.

A.

worries

B.

happiness

C.

freedom

D.

pride

52.

A.

lead

B.

block

C.

offer

D.

stick

53.

A.

places

B.

nature

C.

people

D.

environment

54.

A.

inside

B.

around

C.

outside

D.

next

55.

A.

heart

B.

head

C.

body

D.

mind

36-40CCBDB   41-50ACCBA   46-50ACDBB   51-55 ABDAC


解析:

略

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