首页 > 34. When he knocked at the door, my mother was busy ____ supper.A．preparing forB．in preparingC．to pr

34. When he knocked at the door, my mother was busy ____ supper.A．preparing forB．in preparingC．to pr

题目简介

34. When he knocked at the door, my mother was busy ____ supper.A．preparing forB．in preparingC．to pr

题目详情

34. When he knocked at the door, my mother was busy ____ supper.

A．preparing for	B．in preparing
C．to prepare for	D．to prepare

题型：单选题难度：偏易来源：不详

答案

B

“be busy (in)doing something” 忙于干谋士，要求接动词的-ing形式。准备的直接宾语是“supper”,故其前面不用介词for。

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