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It may be 5 or 10 years it is possible for people to find a space station on the

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It may be 5 or 10 years it is possible for people to find a space station on the

It may be 5 or 10 years __________ it is possible for people to find a space station on the moon.

A.since B.before C.after D.when

试题答案

B

解析试题