I

1. If you had listened to me, you wouldn't have gotten into so much trouble.

2. If there were a screen on the window, there would not be so many bugs in the room.

3. If he were not busy right now, he could help them.

4. If I were good at cooking, I could make all of my own meals.

5. If I were you, I would tell them the truth.

6. If she hadn't come, he would have been disappointed.

7. If he had studied for the test yesterday, he would be a good student.

8. If I had eaten breakfast several hours ago, I would not be hungry now.

9. If she had followed the doctor's orders, she would not be sick.

10. If he had gone to bed early last night, he would not be tired this morning.

II

a. We can not swim in this part of the river because the water is highly polluted.

b. The company does not produce recycled paper, because it is more expensive to produce than regular paper.

c. Because we want people to be aware of the problem of pollution, we havev "a green week" three times a year.

d. Since the area around the beach is full of trash, noone wants to go swimming or sunbathing there.

e. As it startedto rain, we could not keep on cleaning the beach.

f. Mr. Minh is admired because he dedicated all his life to protecting environment.

III

a. I was surprised that no one stopped those people cutting down the trees.

b. People are worried that the oil will pollute the sea.

c. I am proud that my team has won the first award of the competition.

d. They are certain that they can help us clean up the beach.

e. I am very happy that you could recover very quickly.

f. I am disappointed that they did not tell us how to do it.

I

1. If you had listened to me, you wouldn't have got into so much trouble.

2. If there were a screen on the window, there would not be so many bugs in the room.

3. If he were not busy right now, he could help them.

4. If I were good at cooking, I could make all of my own meals.

5. If I were you, I would tell them the truth.

6. If she hadn't come, he would have been disappointed.

7. If he were a good student,he would have studied for the test yesterday, 

8. If I had eaten breakfast several hours ago, I would not be hungry now.

9. If she had followed the doctor's orders, she would not be sick.

10. If he had gone to bed early last night, he would not be tired this morning.

II

a. We can not swim in this part of the river because the water is highly polluted.

b. The company does not produce recycled paper, because it is more expensive to produce than regular paper.

c. Because we want people to be aware of the problem of pollution, we have "a green week" three times a year.

d. Since the area around the beach is full of trash, no one wants to go swimming or sunbathing there.

e. As it started to rain, we could not keep on cleaning the beach.

f. Mr. Minh is admired because he dedicated all his life to protecting environment.

III

a. I was surprised that no one stopped those people cutting down the trees.

b. People are worried that the oil will pollute the sea.

c. I am proud that my team has won the first award of the competition.

d. They are certain that they can help us clean up the beach.

e. I am very happy that you could recover very quickly.

f. I am disappointed that they did not tell us how to do it.