I think the telephone is the second _________ invention.[ ]A. helpful B. more helpful C. most helpfu

题目简介

I think the telephone is the second _________ invention.[ ]A. helpful B. more helpful C. most helpfu

题目详情

I think the telephone is the second _________ invention.
[     ]
A. helpful        
B. more helpful        
C. most helpful    
D. the most helpful
题型:单选题难度:中档来源:同步题

答案

C

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