I can speak ______ English.
This coat ________ be Tom's. He doesn't like the color at all.
—Is Mr. Smith over there? —It ________ be him. He has gone to Beijing on business.
-was the car invented? --It was invented in 1983.
I enjoy playing computer games, but I can't spend too much time ________ that.
________ is bad for your eyes ________ TV too much.