bài 1.
1) If we don't have enough money, we won't buy those pens.
2) If we don't have enough money, we can't buy that doll.
3) If the weather isn't nice,we will at stay home.
4) If It does not rain heavily,we will go for a picnic.
bài 2.
1) -We have not play this game for a long time.
( hoặc ) - It's been a long time. We haven't played this game.
2) - How long does Mary live VN?
3) - My son has been working in Ho Chi Minh City for 3 years.
4) His son didn't like HN for 10 weeks.