二、16-20 ABCBC 21-25 DADBA

　　三、26-37 CADB DCDA ADDB

　　四、

　　38.He lost his arms in the traffic accident.

　　39.Because his partner was ill in hospital.

　　40.Yes.Because it’s important for us to keep a promise./

　　No.Because I will tell him/her my problem and give him/her another.

　　五、38. customer 39. ability 40.manage 41. rising 42.Carefully

　　43.underground 44.preparing 45.popular 46.dressed 47.broken

　　六、51.We should pay more attention to traditional culture.

　　52.Some parents today are too hard on their children.

　　53. His uncle gets used to going out for a walk after breakfast every day.

　　54.Don’t be afraid of making mistakes; we can learn from them.

　　55. I wonder has been in the Volleyball Club.

　　七、One possible version

　　Can middle school students use mobile phones at school?

　　Nowadays,more and more teenagers use mobile phones. Can middle school students use mobile phones at school? Different students have different opinions about it.

　　Some students think they can use mobile phones at school. First, it's convenient for them to call their parents,teachers or friends. Second,they can search what they need on mobile phones. For ex-ample,they can look up new words and look through news.

　　However,some students disagree. They think using mobile phones at school is a waste of time.Many students spend too much time on games and QQ. Besides,it's unhealthy for the mind and the body,such as hurting eyes,making some bad friends.

　　In my opinion,students can't use mobile phones at school. It's bad for our health and study.