---Do you know why Anna hasn’t come to school today? ---I’m not sure. She _______ be ill.
#77446
A
can
B
should
C
must
D
may
推荐题目
I ________worry about my weekend—I always have my plans ready before it comes.
#63400
A
can’t
B
mustn’t
C
daren’t
D
needn’t
It has been announced that all the candidates______ remain in their seats until all the papers have been collected.
#63563
A
can
B
will
C
shall
D
should
If you have difficulty_______a decision，wearing red_______it easier for you to take action．
#77326
A
make；making
B
made；making
C
making；make
D
making；makes
— It seems that Mr. Wu is standing there.— It ______ be him because he called me from Canada just now.
#75592
A
mustn’t
B
can’t
C
needn’t
D
shouldn’t
A hot balloon blew up in Egypt. There ________ something wrong with the quality of it.
#62333
A
may have been
B
must be
C
need have been
D
might be