【題目】We all know that learning a foreign language _________ time and effort.
A.requires
B.reduces
C.removes
D.repeats

【答案】A
【解析】句意:我們都知道學一種外語需要時間和努力。此題考查動詞,A需要;B減少;C消除;D重復。根據(jù)句意,應選A。

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