1. If I don't have a quiet room, I won't be able to do anything.

2. This is the first time they have visited Ho Chi Minh City.

3. Her father has smoked since his wife died.

4. It has rained for an hour.

5. If you use less paper, you will save a lot of trees.

6. The Nile is the longest river in the world.

7. If I had a spare ticket, I could take you to the concert.

8. She has gone back to her home village for two years.

9. This house is the most modern house on the street.

1 . If i don't have a quite room , i won't be able to do anything .

2. This is the first time they visited Ho Chi Minh City.

3. Her father has smoked since his wife died.

4. It has rained for an hour.
5. If you use less paper, you will save a lot of trees.
6. The Nile is the longest river in the world.
7. If I had a spare ticket, I could take you to the concert.
8. She has gone back to her home village for two years.
9. This house is the most modern house on the street.

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