It ___ be the postman at the door. It’s only six o’clock.
#87620
A
mustn’t
B
can’t
C
won’t
D
needn’t
推荐题目
Robert Collier once said, “A single idea---the sudden flash of a thought --- __________be worth a million dollars.”
#88336
A
should
B
may
C
must
D
will
We ________ such great achievements without your efforts. Thanks a lot.
#87483
A
can’t have made
B
couldn’t have made
C
were unable to make
D
are unable to make
