问题描述：
1.Don't sit up and work too hard at night or you'll be run_______.
1.Don't sit up and work too hard at night or you'll be run___a____.
A.apart B.up
C.down D.over
1.Don't sit up and work too hard at night or you'll be run___a____.
A.apart B.up
C.down D.over
问题解答：
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