问题

He _____ in a university for five years, but now he runs a company of his own.

A:has taught
B:had taught
C:taught
D:has been teaching

正确答案是：

同类题型

下列各句中，表达得体的一句

Look at that girl! Is it Susan—No, it _______ be her. She has gone backto her hometown.

See The strange man I saw yesterday _____around my house again. Should I call the police

一May I have some junk food, Mum—I am afraid not. ________bad for your health.

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