【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(xué)家已經(jīng)可以很容易的設(shè)法制造出會(huì)走路和會(huì)跳舞的機(jī)器人。Manage to do sth.根據(jù)句意,所以答案是A。

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