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Often when he______have been doing something that was given him, he wasted his time drawing little pictures.
Often when he______have been doing something that was given him, he wasted his time drawing little pictures.
admin
2014-09-24
51
问题
Often when he______have been doing something that was given him, he wasted his time drawing little pictures.
选项
A、must
B、need
C、should
D、would
答案
C
解析
should have done或should have been doing…表示应该(在)做某事而实际没做。must have been doing…"(过去)一定在做……",表示对过去的肯定推测。
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