Someone is knocking at the door. It my sister. It's time for her to be back.
#75649
A
can’t be
B
may not be
C
must be
D
mustn’t be
推荐题目
… Come to supper with us, Peter. … Great! I _______ bring a bottle of wine.
#62452
A
will
B
can
C
may
D
must
It _____ last night., because the ground is all wet
#63480
A
should rain
B
should have rained
C
must rain
D
must have rained
---Someone is knocking at the door. Who may it be? ---It ______ be Tom. He is still in the school.
#74601
A
can’t
B
mustn’t
C
couldn’t
D
may not