题目内容
4. What while John was at the bus stop?
A. was happened B. is happening
C. happened D. happens
4. C
4. C解析:happen没有被动语态,排除选项 A; while后是一般过去时,故主句也用过去 的时态,排除选项B和D.故选C.
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题目内容
4. What while John was at the bus stop?
A. was happened B. is happening
C. happened D. happens
4. C解析:happen没有被动语态,排除选项 A; while后是一般过去时,故主句也用过去 的时态,排除选项B和D.故选C.