a)1. I/ not/ seen/ him/ since/ we/ leave/ school.
=> I have't seen himsince we left schol
2. This/ be/ first time/ Tim/ see/ rice paddies.
=> This is the first time Tim has ever seen rice paddies.
3. Compost/ make/ from/ household and garden waste.
=> Compost can be made from household and garden waste.
4. He/ tell/ me/ that/ he/ borrow/ book/ school library.
=> He told me that he borrowed that book from the school library
5. Would/ you/ mind/ if/ I/ sit/ here ?
=> Would you mind if I sat here?
b)1.This is the first time I have eaten this kind of food
2. My brother has worked in that factory for five years
3. Nam asked Nga if he could borrow her bike.
4.This is Phong's pen
5.The streets haven't been cleaned this week
6. Apples are not usually more expensive than oranges
7. He prefers playing golf to tennis
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