22/ Thanks to television,people can watch a _ of local and international programs on different channels.
A.class
B.group
C.variety
D.stage
23/ he doesn't let anyone__in the working tim .
A. To taking
B. to take
C . Talk
D. Talks
24/ this is the girl __ mother is from Canada .
A.What
B. Whose
C.whom
D.who
25/ it's dark in here . Can I _the lights?
A. Turn off
B.Turn on
C.turn in
D. Turn up