-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
. —How can I thank you? —Don’t mention it. Any other man in that case _______ the same thing. 
#88540
A
would have done
B
could have done
C
must have done
D
should have done
 – Mary was crying sadly.  -- Oh, she ________ the bad news that her mother was badly injured in the accident.
#87842
A
must know
B
might have known
C
must have known
D
should have known
Doctors recommended that a modern hospital _________.
#87682
A
being built
B
be built
C
should build
D
build