【正文】
12. He became a worldfamous scientist. 13. It is getting warmer and warmer. food has turned bad. 15. Keep quiet, children! weather continued fine for a long time. 17. It remains to be proved. news was surprising. 19. His job is teaching English. only method is to give the child more help.21. I must be off now. bridge is under construction. appears/ seems to be very young. appears/ seems to have caught cold. meeting turned out to be successful. theory proved to be right. remains to be done. ’s why he fell ill. idea is that we should help him. seems/ appears to me that something is wrong. sounds to me as if someone were trying to get into the house. voice sounds as if you had a cold. looks as if it is going to rain. is at home/ in the library/ on the way home/ on holiday. boy was moved/delighted/surprised/ disappointed/astonished。 has bee/ got/ grown/ interested in modern physics?!?