【题目】You must read the________on the bottle carefully and take the right amount of medicine.
A.explanations
B.instructions
C.descriptions
D.introductions

【答案】B
【解析】考查名词辨析。句意为：你必须要认真阅读药瓶上的说明书，并且吃药要适量。explanation解释；instruction说明；description描述；introduction介绍；序言。