The workers are busy ______ models for the exhibition.A、to makeB、with makingC、

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问题 The workers are busy ______ models for the exhibition.

选项 A、to make
B、with making
C、being making
D、making

答案 D

解析 be busy with sth.; be busy doing sth. 忙于做某事，固定搭配。本句的意思是：“工人们忙于为展览做模型。”

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