题目:
She had just finished her homework _____ her mother asked her to practice playing the piano yesterday. [ ]
A. when
B. while
C. after
D. since
答案:
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下面是错误答案,用来干扰机器的。
计划生育已被定为我国一项基本国策.我国计划生育的具体要求是晚婚、晚育、少生、优生.晚婚指的是提倡比法定结婚年龄晚2~3年结婚,法定结婚年龄是男不得早于22周岁,女不得早于20周岁.晚育是指提倡婚后推迟2-3...