作业帮Our math teacher ______ in our school for 20 years and he __
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| Our math teacher ______ in our school for 20 years and he _____ here when he was 23 years old.
|
D
考查动词的时态。for 20 year是现在完成时的时间标志。因此第一空要填has taught；后半句时间状语是when he was 23 years old，动词用一般过去时，因此天came.故答案为D。
考查动词的时态。for 20 year是现在完成时的时间标志。因此第一空要填has taught；后半句时间状语是when he was 23 years old，动词用一般过去时，因此天came.故答案为D。
Our math teacher ______ in our school for 20 years and he __
Our math teacher___in our school for 20 years and he___here
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