There _____ a lot of coal mines in the south, but many of them have been closed or are _____ be closed.
A. use to having; about to B. used to be; to
C. use to having; going to D. used to be; supposed to
在线课程B
编辑:chaxungu时间:2026-05-02 03:31:25分类:高中生物题库
There _____ a lot of coal mines in the south, but many of them have been closed or are _____ be closed.
A. use to having; about to B. used to be; to
C. use to having; going to D. used to be; supposed to
在线课程B