21. Waste chemicals and smoke from vehicles and factories pollute not only the air _________the land and water as well. A. and B. with C. but D. not 22. If she_________the airport, I’ll get you know. A. arrives B. arrive C. arrived D. will arrive 23. If people solve the problems of smoke from vehicles and factories , the air ___ pure and fresh. A. is B. will be C. won’t be D. would be 24. There is more pollution in the city _________ there is more traffic in the streets. A. and B. because C. because of D. but 25. The kids didn’t go to the movie last night _________ it rained very heavily. A. and B. but C. as D. so 26. He hit the wall _________he rode carelessly. A. because B. but C. and D. moreover 27. The bus didn’t stop _________ it was full of passengers. A. since B. but C. and D. so 28. Children should drink milk _________ it’s good for their health. A. and B. as C. but D. however 29. The air is seriously polluted _________ the factories produce a lot of smoke. A. and B. however C. since D. but 30. If people _________ public transport, there will be less pollution. A. use B. will use C. can use D. used 31. If it is raining this evening, I _________ A. will go out B. don’t go out C. won’t go out D. wouldn’t go out 32. Minh’s English is excellent. He speaks _________ . A. perfectly English B. English perfectly C. English in perfect way D. English perfect 33. He _________ to find a job but he had no luck. A. hardly tried B. tried hardly C. hard tried D. tried hard 34. You used to live in Los Angeles, _________? A. don’t you B. usen’t you C. did you D. didn’t you 35. If the sea water continue to be polluted, many fish species _________ extinct. A. became B. will become C. would become D. become 36. We postponed the picnic _________. A. because it rained heavy C. because of the heavily rain C. because it was raining heavily D. because it was raining heavy 37. Plants _________ if they don’t get sun and water. A. die B. would die C. won’t die D. are going to die