—Someone is knocking at the door. Is it Ann?—It _____ be her. She is giving a performance at the theatre now.
#75354
A
may
B
must
C
can’t
D
mustn’t
推荐题目
---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
________ you row a boat at the age of 10? No, but now I ________.
#75228
A
Can；can
B
Can；could
C
Could ；can
D
Could；could
You drink wine before driving, or the police will take your license away.
#77356
A
don’t have to
B
needn’t
C
mustn’t
D
may not
The bus ____ at six, but it arrived an hour later.
#63180
A
should arrive
B
had arrived
C
should have arrived
D
must arrive
Since nobody gave him any help，he ________ have done the research on his own.
#62304
A
can
B
must
C
would
D
need