It is hard to say what kind of person he is．Sometimes he is very friendly; at other times he ___ be very cold．
A．can B．must C．will D．shall
In my opinion, ___ matters is not one’s looks, but one’s inner thoughts．
A．that B．it C．what D．which
Not far from the school there was a garden, _____ owner sat in it playing chess with his grandson every afternoon.
A. its B. whose C. which D. that
So involved with computers ____ that the leaders at the summer computer camps often had to force them to break for sports．
A．has the children become B．did the children become
C．has become the children D．became the children
--Are you going somewhere during the winter vacation?
--Yes, I’ve found a nice beach ________ I can enjoy swimming even in February．
A．that B．when C．where D．which
_______ to change her schedule because the plane arrived late, the famous actress cancelled the appointment with the local press．
A．Forcing B．Forced C．To force D．Being forced
