用所给动词的适当形式填空。 1. Mr Brown will go fishing if it____(not rain) tomorrow. 2. I think he (be) back in a week. 3. -Who (knock) at the door? -I don't know. Let me go and see. 4. Bill is strict with himself. He never (leave) today's work for tomorrow. 5. - your uncle____ (return)the video tapes to Mr Fox? -No. They're still in his bedroorn. 6.I (not allow)lo stay up late on weekends. 7. Mr Wang (read) a newspaper in the office at this time yesterday. 8. Mr Green and his wife (live)in London for a few years. 9. They never knew what (happen) to the world in a hundred years. 10. About 400 years ago, Calileo(伽利略)proved that the earth___(go) around the sun.