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Rebecca949 发表于 2013-11-1 11:25

六级练习2013.11.01

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In order for a chemical to be considered a drug, it must have the capacity to affect how the body works. (1)_________________________. Drugs are approved only after tests have demonstrated that they are relatively safe when used as directed and when their benefits outweigh their risks.
Thus some very dangerous drugs are approved because (2)______________________. Many people suffer ill effects from drugs called side effects, (3)________________________. The human population contains a great variety of genetic variation, but drugs are tested on just a few thousand people.





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iamdengyue 发表于 2013-11-2 01:31

支持下去。。。会认真学习，有用~

susan.sui 发表于 2013-11-4 09:20

***has the power to do this is completely safe
they're necessary to treat serious  illnesses
even though they take the drug exactly as directed.

lbxg 发表于 2013-11-15 10:39

nice

伊梦青依 发表于 2014-4-28 09:56

stance has a power to do this it completely safe

a58246983 发表于 2014-4-28 11:02

answer

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