they spent all night ( )the work .so they were very tired in the morning.A.do B.doing C.to do D.did

分类: 作业答案 • 2021-12-20 07:20:17

问题描述：

they spent all night ( )the work .so they were very tired in the morning.
A.do B.doing C.to do D.did

答

B
spent some time on doing sth
其中on可以省略,后面跟ing形式
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