最佳答案:

　　12345BCCBA678910CCBCD1112131415CBDBA1617181920CAACD

最佳答案:

　　2122232425BADCC2627282930ABBDD3132333435CCBAD

最佳答案:

　　3637383940CDACB4142434445ABCCD46474849/BCDA/50. 有一些人带宠物去宠物医院的次数比他们自己去医院还频繁。

　　51. wear/have； and

　　52. believes/thinks； bad

　　53. friends；crazy

　　54. problem；men/guys

　　55. should；allowed/agreed

最佳答案:

　　56. use to be afraid of the dark

　　57. having trouble making/writing

　　58. asking the teacher for help

　　59. made a difficult decision to

　　60. concentrate more on. studies

最佳答案:

　　One possible version:

　　Dear Lin Tao,

　　As a teenager, I met the same problem as you. But now I can deal with them. Here are some advice for you.

　　You can improve your listening skills by listening to English tapes. It's also a good way for you to join an English club. Before an English exam，you'd better try to relax yourself by taking a walk before going to bed. And you can drink a cup of hot milk. I'm sure it helps a lot.

　　As a student in Grade 9, you must be very tired sometimes. But I really want to say，"Lin Tao，never give up!" I hope what I say here can help you a lot. I believe you can make progress in study.

　　Best wishes.

　　Yours,

　　Alice