You must read the with great care to see if the drug contains PPA before it is taken.A. i

问题补充：

You must read the with great care to see if the drug contains PPA before it is taken.

A. instructions

B. introductions

C. explanations

D. Expressions

答案：

(答案→)A. instructions

B. introductions

C. explanations

D. Expressions

解析：名词词义辨析题。在服药之前你必须仔细阅读说明书看清药品含是否有PPA成分。A. Instructions 说明书 B. introductions 序言 C. explanations 解释 D. Expressions 表达根据语境选A