1C 2A 3C 4A 5D 6C 7D 8D 9B 10A 11B 12A 13A 14C 15B 16A 17B 18D 19B 20C 21D 22 23B 24B 25D 26C 27A 28A 29A 30C 31B 32C 33A 34A 35B 36B 37B 38A 39B 40A 41C 42B 43A 44B 45D 46B 47C 48C 49D 50A
1. takes
2. are working
3. didn't watch
4. I haven't played computer games for three months
5. Hung said that he often went to English speaking club at the weekend.
6. A supermarket was built near the airport last year.
8. It is necessary that we should use fewer plastic bags
9. Taking part in English Speaking Festival will help you to improve your English.
10. We can save natural resources by using solar energy instead of fossil fuels