问题

Teachers required that all the students ___ their homework all alone.

A:must finish
B:would finish
C:had to finish
D:finish;

正确答案是：

同类题型

Is Jack on duty today — It ________ be him. It’s his turntomorrow.

Your mother becomes more and more forgetful. —Yes. She searched for her cellphone for a whole day last Sunday but it ___ in her coat pocket the next day.

his old age,we didn’t invite him to climb the mountains with us. [ ]

How did the police___________that accident

Don’t pretend ________ when you don’t.