—How many times have you been to China?—In fact it is the first time I here.A. wasB. amC

问题补充：

—How many times have you been to China?

—In fact, it is the first time I here.

A. was

B. am

C. had been

D. have been

答案：

A. was

B. am

C. had been

(答案→)D. have been

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