问题

How often _ the Olympics___?—Every four years.

A:is, taken place
B: is,hold
C:does, hold
D:does, take place

正确答案是：

同类题型

There are some police cars in front What do you suppose ____?

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t sure of the reason for the dog’s illness, but it ____ by eating too much.

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e each subject seriously in college and even though you learn isn’t important for your life, the learning skills you acquire will be something to be cherished forever.