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【题目】

As we all know, improving one's reading ability _______ speed and comprehension.

A. covers

B. contains

C. refers

D. involves

【答案】D

【解析】考查动词词义辨析。句意:我们都知道,提高阅读能力涉及速度和理解。根据句意,用involve涉及,牵涉到'合适。cover覆盖;contain禽有;refer和to搭配时才表示涉及之意,所以三个选项都不符合句意。

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