[题目] It ten years since Professor Du last to the earth.A. was, came B. has been, comeC. was, come D. is, came 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】 It_______ ten years since Professor Du last_______ to the earth.

A. was； came B. has been； come

C. was, come D. is； came

【答案】D

【解析】

试题分析：句意：自从杜教授上次来地球已经是10年的时间了。根据It is ten years since+一般过去式的一般疑问句，故选D.

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