There ______ be a lot of manatees, but now they______ endangered animals.[ ]A. used to, become B. wo

题目简介

There ______ be a lot of manatees, but now they______ endangered animals.[ ]A. used to, become B. wo

题目详情

There ______ be a lot of manatees, but now they ______  endangered animals.
[     ]
A. used to, become              
B. would, become  
C. used to, have become
D. would, have become
题型:单选题难度:中档来源:同步题

答案

C

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