The students are busy ______ the examination.A、preparing forB、preparingC、to pr

游客2025-03-13  0

问题 The students are busy ______ the examination.

选项 A、preparing for
B、preparing
C、to prepare
D、to prepare for

答案 A

解析 固定短语。be busy doing sth.意为“忙于做某事”。
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