We must try _____ English well because it's very useful.[ ]A. learnB. learned C. learningD. to

题目简介

We must try _____ English well because it's very useful.[ ]A. learnB. learned C. learningD. to

题目详情

We must try _____ English well because it's very useful.     
[     ]
A. learn  
B. learned    
C. learning    
D. to learn
题型:单选题难度:中档来源:同步题

答案

D

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