题目内容
She had just finished her homework ______ her mother asked her to practise playing the piano yesterday.
A. when B. while C. after D. since
A
句意: 昨天她刚做完作业, 她妈妈就让她练钢琴。when在本句中作并列连词, 意为: and at that time。while作并列连词, 表示“对比转折”; after为从属连词或介词, 意为“在……之后”; since自从……时候, 既然……
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