-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
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Don't handle the vase as if it ______ made of steel.
#87420
A
is
B
were
C
has been
D
had been
He called to tell me that you are in hospital, otherwise I ______ nothing about it.
#86456
A
had known
B
wouldn’t have known
C
would know
D
would have known