Research shows that humans ______ from selfish to unselfish behavior when they are watched.
A.tell | B.switch | C.range | D.distinguish |
I often see lights in that empty house. Do you think I ______ report it to the police?
A.should | B.may | C.will | D.can |
--- I don't mind telling you what I know.
--- You ______. I'm not asking you for it.
A.mustn't | B.may not | C.can't | D.needn't |
Coal is hard, like a rock and yet it burns, while no rocks ______.
A.do | B.does | C.are | D.is |
--- John, where are the cookies? Don’t tell me you ate them all!
--- ______ I couldn’t help it. They were so good.
A.Yes, I did. | B.No, I didn’t. |
C.Yes, I have. | D.Why? Sounds strange! |
--- How will I ______ you at the station?
--- Well, I’m wearing a hat and I’ve got a big black umbrella with me.
A.recognize | B.notice | C.see | D.realize |