【題目】Scientists have managed _________ robots walk and dance easily.
A.to make
B.making
C.makes
D.to making

【答案】A
【解析】句意:科學家已經(jīng)可以很容易的設法制造出會走路和會跳舞的機器人。Manage to do sth.根據(jù)句意,所以答案是A。

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