问题
选择题
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
答案
答案：C
搜题请搜索小程序“爱下问搜题”
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
答案：C