When I was a child, I used to ___________ chocolate.
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.