问题
选择题
The pollution problem here seems to get more and more serious .Something ____with it .
A．has done
B．must be done
C．is doing
D．was done
答案
答案：B
此题重点考查含有情态动词的被动语态的基本构成和用法。
搜题请搜索小程序“爱下问搜题”
The pollution problem here seems to get more and more serious .Something ____with it .
A．has done
B．must be done
C．is doing
D．was done
答案：B
此题重点考查含有情态动词的被动语态的基本构成和用法。
间隙2mm，正中