1．B 2．A 3．C 4．A 5．C 6．A 7．B 8．C 9．A 10．C 11．C 12．B 13．B 14．A 15．A 16．B 17．A 18．D 19．B 20．C 21．C 22．C 23．D 24．D 25．B 26．C 27．A 28．D 29．A 30．B 31．B 32．A 33．C 34．D 35．C 36．A 37．D 38．B 39．A 40．B 41．D 42．B 43．C 44．C 45．D 46．A 47．B 48．C 49．A 50．D 51．C 52．A 53．B 54．D
1．D 2．E 3．A 4．C 5．B 6．C 7．E 8．D 9．A 10．B
11. It's time to have supper.
12. Would you like some bread?
13. Ann is too young to go to school.
14. John runs as fast as me.
15. Mrs. Black often helps us with our English.
16. How long did it take you to do your homework yesterday?
17. The teacher tells us to speak English every day.
18. Why not let the children do what they like?
19. When the teacher came into the classroom, the students stopped talking at once.
20. I don't think your answer is right.