You had better not keep the window open , ____ ? 
#89743
A
will you
B
did you
C
had you
D
would you
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I’m afraid Mr. Harding ______see you now. He’s busy.
#87913
A
can’t
B
mustn’t
C
shouldn’t
D
needn’t
I was so young.  You__________ better than to rely on me
#88037
A
should have known
B
should know
C
must know
D
must have known