We can't do well in exams _________we study hard in school time. [ ]A. ifB. andC. since D. unle

题目简介

We can't do well in exams _________we study hard in school time. [ ]A. ifB. andC. since D. unle

题目详情

We can't do well in exams _________we study hard in school time.        
[     ]
A. if        
B. and      
C. since    
D. unless
题型:单选题难度:中档来源:同步题

答案

D

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