题目内容
【题目】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
【答案】D
【解析】本题考查动词的时态。由时间状语for 20 years和when he was 23 years old及整个句子的意思知,前一个空需用现在完成时,后一个空需用一般过去时,故选D。
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