—What does this sign mean, Miss Chen?—Oh, it says that we ________take photos here.A. needn’t B. may not C. mustn’t
--Do you think ________ ending of the story is surprising? --No, not at all. I can guess it.
Most children are interested in amazing things, and they wonder ______.
---You bought the car ten years ago? ---Yes. ______ it’s old, it still runs well.
---Relax. Don’t work today. Just ______. ---Thanks a lot.
I don’t think one country can solve the problem of pollution alone, _______?