Many teachers don’t want theirstudents to ________ doing too much homework.A.keep busy

Many teachers don’t want their students to ________ doing too much homework.
A.keep busy       B.be kept busy
C.keep busying    D.be kept busying

 

 

答案

B

 

keep的主语是their students,它们之间存在被动关系,busy为形容词作补足语。实际上该句是keep sb. busy doing sth.的被动结构。

 

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