21. —What do you think of the idea of Web TV?
--Web TV is a world of interactive TV programming, ______ anything wonderful can happen.
A. the world which B. the world where
C. a world which D. a world where
22. ______ with modern facilities, the lab is intended to seat more than 2000 students, _____ excites all of them.
A. Equipped; that B. Having equipped; that
C. Equipping; as D. Equipped; which
