----Look at the boy running on the playground. Is it David? ---- It ______ be him. I saw him go to the teachers’ office just now.
#53899
A
mustn’t
B
can’t
C
may not
D
needn’t
推荐题目
I plan         to a movie with my friends on Saturday.
#60245
A
to go
B
to see
C
to make
D
to move
Gina_____ a lot since she joined the art club.
#53072
A
learns
B
learned
C
will learn
D
has learned
Do you have difficulty ____ English?
#54275
A
to learn
B
of learning
C
learning
D
learn
The news made me _____.
#54120
A
to be happy
B
happy
C
being happy
D
be happy
Li Ming is in poor health. He should pay more attention _________ exercise. 
#57164
A
to take
B
to taking
C
for taking
D
in taking