题目内容

He __________ well in the exam last week, so he __________ hard now.
A. did, studied    
B. didn't, is studying   
C. didn't do, is studying
D didn't, studying   
C
句意：上周的考试他做的不好，因此现在他正在努力学习。根据句意可知前半句考查一般过去时，后半句考查现在进行时的用法，故选C。
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