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It is high time, I think, that you got down to ______ something in class.
A.doB.didC.doingD.does
C

试题分析:考查动名词做宾语:get down to开始认真做…,to是介词,后面接动名词做宾语,句意:我想正是你在班级认真做事的时候了。选C。
点评:有的词组里面的to是介词,后面要接动名词做宾语,如:pay attention to,look forward to ,be used to等。
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