问题
选择题
She had just finished her homework ________ her mother asked her to practise playing the piano
yesterday.[ ]
A. when
B. while
C. after
D. since
答案
答案：A
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She had just finished her homework ________ her mother asked her to practise playing the piano
yesterday.[ ]
A. when
B. while
C. after
D. since
答案：A