题目内容：

[-A9] The pupils here _____ all kinds of exercises every day in the last four weeks.
A.keep busy doing
B.keep on doing
C.have kept busy with
D.have been kept busy doing
翻译并分析

优质解答

翻译：在过去的四周内,这里的小学生一直被使得每天忙于做各种各样的练习题.1.短语“in the last/past + 一段时间”做句子时间状语时,意思是“在过去的一段时间内（截止到现在）”,要求句子必须采用现在完成时,排除AB...