问题

The two dogs were used to___ in this strict way and they were once used to_ prisoners who had run away from prison.[ ]

A: being trained, search for
B: being trained, looking for
C: be trained, search for
D: training, look for

正确答案是：

同类题型

______ your school ______ a SchoolDay —Yes , it is in May .

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_____ and see a film this afternoon—That’s a good idea.

It’s hard to believe that Jack ________ have fought with the policeman.—Yes.If one ________ ask for trouble, it can’t be helped.