—You didn’t invite Mary to the ball?—____ her, too? 
#89489
A
Must I invite
B
Should I have invited
C
Must I have invited
D
Should I invite
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--I'm told that John had another car accident this morning.--I believe not. He  _________so careless.
#90014
A
shouldn't have been
B
wouldn't have been
C
couldn't have been
D
mustn't have been
It’s a shame ______ able to give them any advice.  
#87215
A
not to have been
B
to have not been
C
to have been not
D
to not have been
______ him well, I would have invited him to my birthday party.
#87956
A
Had I known
B
Should I know
C
If I know
D
If I knew