29. As we all know the Olympic Games in London which is an ancient city.A. are to

问题补充：

29. As we all know, the Olympic Games in London, which is an ancient city.

A. are to hold

B. will hold

C. are to be held

D. are held

答案：

A. are to hold

B. will hold

(答案→)C. are to be held

D. are held

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