—What did you say to your sister? I saw her crying in the room.— It _________ my fault. I just said hello to her when I met her, nothing else.
#62216
A
must have been
B
can’t have been
C
oughtn’t to be
D
should have been
推荐题目
I __________use a clock to wake me up because at six o'clock each morning the train comes by my house.
#63362
A
couldn’t
B
mustn’t
C
shouldn’t
D
needn’t
– Must I clean up the classroom right now, Miss Green?-- No, you ______.
#75722
A
mustn’t
B
can’t
C
needn’t
D
may not
It is hard to say what kind of person he is．Sometimes he is very friendly; at other times he ___ be very cold．
#62687
A
can
B
must
C
will
D
shall
Alice be at school because she phoned me from her home a minute ago.
#76102
A
mustn’t
B
isn’t able to
C
may not
D
can’t