-Why didn’t Susan come to see us yesterday as she promised?-______. 
#87312
A
She must be busy
B
She might have been free
C
She must have been busy
D
She can’t be free
推荐题目
No wonder you caught a cold. You________have gone out last night without a coat.
#88360
A
shouldn’t
B
mustn’t
C
couldn’t
D
mightn’t
The sleeping baby would be scared ________ a sudden loud noise.
#86493
A
was there
B
there was
C
should there be
D
there should be
I_______  such a foolish mistake if I had been a little more careful.
#87484
A
wouldn’t make
B
wouldn’t have made
C
hadn’t made
D
didn’t make