Yesterday something ________ happened. We didn't know what it was.
A．unhappy B．uneasy C．unable D．unusual
This coat ________ be Tom's. He doesn't like the color at all.
A．must B．might C．could D．can't
—Is Mr. Smith over there?
—It ________ be him. He has gone to Beijing on business.
A．can't B．must C．might D．can
- was the car invented?
--It was invented in 1983.
A. When B. Why C. How D. Who
I enjoy playing computer games, but I can't spend too much time ________ that.
A．in B．on C．for D．to
________ is bad for your eyes ________ TV too much.
A．It; to watch B．It; watching
C．This; to watch D．This; watching
