His stepmother did what she could _____ him．
A．help B．helping C．to help D．in helping
Do you know the most interesting story __________ took place long ago．
A．which B．that C．who D．×
Living in a house on a mountain top ______ be rather cold,
especially in winter.
A. can B.
shall C. need D.
should
_______ a reply from Mabel, Jack sent another e-mail to her.
A. Not receiving B.
Having not received
C. Not
received D.
Not having received
The question under discussion here is ______ of the "white
pollution".
A. that B. which C.
one D. it
I hate _______ when someone calls or knocks at the door while I’m still
in bed.
A. it B.
that C.
them D. those
