Look at the mess the boys made! You _______ have taught them how to behave themselves.
#87866
A
must
B
may
C
can
D
should
推荐题目
It’s required that the students______ mobile phones in their school, so seldom ______ them using one. 
#86714
A
not use; will you see
B
should not use; you will see
C
don’t use; will you see
D
would not use; you will see