Our math teacher ________ to our school ...

Our math teacher ________ to our school at the age of 20 and she ________ in our school for more than 30 years.

A. comes; taught B. came; taught C. came; has taught D. has come; has taught

C 【解析】句意：我们的数学老师20岁时来到我们学校，她在我们学校教了30多年书。at the age of 20 是表示过去的时间状语，时态为一般过去时态，for more than 30 years. 是表示截止到目前的时间段，说明的是现在的状况，适用于现在完成时态，故答案为C。

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