Our math teacher in our school for 20 years and he here when he was 23 years old.A. has taught; has come B. taught; comesC. taught; came D. has taught; came D [解析]句意:我们的数学老师在我们学校教了20年.他在25岁时来到这里.第� 题目和参考答案——青夏教育精英家教网—

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（题文）Our math teacher ________in our school for 20 years and he ________here when he was 23 years old.

A. has taught; has come B. taught; comes

C. taught; came D. has taught; came

D 【解析】句意：我们的数学老师在我们学校教了20年。他在25岁时来到这里。第一句指到现在已经20年，因此用完成时；第二句有确切的过去的时间状语，因此用一般过去时。故选C。

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