假设你是Peter，你的同学Mike经常在教室里随地丢纸片、塑料袋等；他还避开父母和老师抽烟。作为同学， 你将如何劝说他改掉不良的习惯？请你给他写一封信。
要求:1. 用上所有提示，可适当发挥； 2. 语言正确，行文流畅，书写规范；
3．词数：80左右。信的开头和结尾已给出；4．文中不能出现真实姓名及校名。
Dear Mike,
As your classmates and one of your best friends,
Yours,
Peter
By the first day of August, 2007, the PLA ________ for eighty years.
| A．founded | B．has founded |
| C．has been found | D．had been founded |
Have you ever gone?
| A．surfing | B．to surf | C．surf | D．surfed |
— Could you tell me Zhang Daqian Museum ?
—The day after tomorrow, I think.
A. when will you visit
B. when you will visit
C. when you would visit
—What do you think of the film named Let the bullets fly(让子弹飞)?
—I have no idea, because I _____ it.
| A．don’t see | B．won't see | C．haven’t seen | D．didn’t see |
–Your bedroom is dirty. Please tidy _____ up.
-Ok, mum.
A. it B. its C. them