III
1. the ao dai is traditional dress of Vietnamese women
2. Woman usually wear it in the daily life
3. Poets, musician mentioned the ao dau in poems, songs
4. To the Vietnamse people ao dai is a symboy of grace and beauty
IV
1. We are writing to you about the polluted made from factory near the school
2. They produce so much smoke that we can not breathe
3. What do you think about polluting activities?
4. We are looking forward to hearing from you