-- Look at the boy running on the ground. Is it David?-- It _______ be him. I saw him go to the teacher’s office just now.
#77075
A
might
B
could
C
can’t
D
mustn’t
推荐题目
Some teenagers would rather _____ than _______ in their spare time. 
#75991
A
play computer games, doing exercise
B
to play computer games, to do exercise
C
play computer games, do exercise
D
playing computer games, do exercise
I looked everywhere for the book, but I ______find it
#76915
A
mustn’t
B
needn’t
C
may not
D
couldn’t
You _________ to the meeting this afternoon if you have something important to do . 
#76135
A
needn’t to come
B
don’t need come
C
don’t need coming
D
needn’t come
We should spend as much time as we _______ over our lessons.
#63678
A
go
B
can to go
C
can go
D
can going