His shoes are muddy. He        be working in an office all day.
#63593
A
mustn ’t
B
can’t
C
needn’t
D
maybe
推荐题目
You ________ in person; a telephone would have been enough.
#62344
A
couldn't have come
B
needn't have come
C
shouldn't have come
D
mustn't have come
Tom’s score on the test is the highest in the class. He _____.
#62444
A
should study last night
B
should have studied last night
C
must have studied last night
D
must study last night