问题

boy was sittingat the desk, ______ hard when his mother got home.

A:to pretend towork
B:to pretend to be working
C:pretending towork
D:pretendingto be working

正确答案是：

同类题型

The UN is trying to ______ the world ________ hunger.

________ is mentioned above that the number of the studentsin senior high school is increasing

Could you tell me—PSP.

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