--- Can we leave the classroom now?-- No, you ______. You ______ to leave until the bell rings.
#75539
A
mustn’t, are allowed
B
don’t have to, are supposed
C
needn’t, aren’t allowed
D
can’t, aren’t supposed
推荐题目
Don’t use water to put out the fire if oil catches fire. As is known, oil ____ float on water.
#63170
A
shall
B
must
C
may
D
will
--- You ________ have bothered doing the washing-up. I could manage it myself. --- That’s OK, No problem.
#63634
A
wouldn’t
B
mustn’t
C
needn’t
D
couldn’t
— I can’t get through to the general manager’s office.—The line is busy. Someone ________ the telephone.
#76155
A
must have used
B
could use
C
could have used
D
must be using