【題目】Life is like riding a bicycle. To keep your balance (平衡), you ________ keep moving.

A.mustB.canC.can’tD.mustn’t

【答案】A

【解析】

句意:生活就像在騎自行車。為了保持平衡,你必須不斷前進。

考查情態(tài)動詞辨析。must 必須;can 能,會;can’t不能,不會;mustn’t 禁止。根據(jù)常識可知,騎自行車想要保持平衡你只能不斷前進,表達(dá)“只能;必須”,故選A

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