1.  If you match difficult problem , please ask your friends or your teachers untill you know it throughly .

2.  Then I ask friends to the badminton play-ground, enjoying autumn sun and autumn breeze.

3.  Class 4, Grade 95 English Department Guangdong Universiy of Foreign Studies China July, 9, 1997.Dear Joan, I've received your letter for 3 days.

4.  And during these days, I asked some friends about your questions.