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单选题 英语六级
2016-11-08

A．They help the elderly more than the young．
B．They are beneficial in one way or another． 
C．They generally do not have side effects．
D．They are not based on real science．
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参考答案

D

答案解析

Q：What does the speaker say about most memory supplements?
【解析】D。短文中提到，很多这类补充剂的成分不一定是它们宣称的那样……它们大多数都没有科学依据。D是对短文中The science isn’t there behind most of them．的同义转述。

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