问题

The factory was built in a secret place, around _________ high mountains.

A:which was
B:it was
C:which were
D:them were

正确答案是：

同类题型

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What ________ results!

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180. The monkey came down and _______ onto the elephants back.

If you keep ________ with silly questions, I shall go out of my senses.[ ]