Teachers required that all the students ___ their homework all alone.     
#87338
A
must finish
B
would finish
C
had to finish
D
finish
推荐题目
— Do you still remember when we went to Chongqing? —I can’t remember now but ______ sometime last summer?
#90411
A
could it be
B
might it be
C
could it have been
D
might it have been
If we had taken such effective measures much earlier, the river ________ so seriously now.
#86813
A
is not polluted
B
would not be polluted
C
had not been polluted
D
would not have been polluted