问题

ll cost a lot of time ____ , Ithink we shall need it and it will certainly be useful

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

What happened to him —He was murderlast week.

There will be a computer ______ a computer ______ the future.

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Does Bob a cat— Yes, he does. The cat a nice room.