Is that a _______?
-Why don’t your parents buy the house now ? They are rich enough. -They are waiting for a _______ price.
I put the books ___________ I have read twice in the box. I want to read them again some day.
Next Monday a talk on developments in science and technology __in the school hall.
-Is the man on the playground your English teacher? -It _________ be him. He has gone home.
-Did you see the soccer match yesterday ? -No, I didn’t. But I ___________ the result. The score was 3:0, Chinese won.