The pupils here all kinds of exercises every day. A. kept busy doing B. keep on doing ——青夏教育精英家教网—

摘要： The pupils here all kinds of exercises every day. A. kept busy doing B. keep on doing C. have kept busy doing D. have been kept busy doing

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The pupils here_____ all kinds of exercises every day in the past few weeks.

　A. kept busy doing B. keep on doing

　C. have kept busy doing D. have been kept busy doing

The pupils here ________ all kinds of exercises every day in the past four weeks．

A．kept busy doing

B．keep on doing

C．have kept busy doing

D．have been kept busy doing

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