Time should be made good use out lessons well.A. of learningB. to learnC. to learningD. o

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A. of learning
B. to learn
C. to learning
(答案→)D. of to learn
解析：考查短语“利用时间做某事”make good use of time to sth。不定式to do做目的状语。句意“应该充分利用时间学好课堂内容。