-Hey, Jack! I’ve worked on this math problem half an hour ,but it’s got me nowhere. Could you give me a hand ?- ______ . I’m good at math.
--Alice, could you help me _______ the map of the world? We don’t need it. --With pleasure.
--_______ do you go to the movie with your mother? -- I seldom do that.
--_________ useful invention the computer is. --Yes, It helps us a lot.
-- Be careful, _______ you will make mistakes in your exams. --I know that, Mrs. White. One can never be too careful.
We don’t know when the sports meeting ______. When it ______, please tell me .