VII.

1.Water pollute in the lake has made the fish die. => pollution

2. Factories don’t dump waste into rivers if the government fines them heavily. => won't

3. The earthquake occurred at midday when many people had had lunch. => were having

4.Hundreds of houses destroyed after a tornado hit the small town of Texas. => were destroyed

VIII.

1.Students are more aware of protecting the environment. Teachers teach environmental issues at school.

=>  If teachers teach environmental issues at school, students will be more aware of protecting the environment

2.People speak English all over the world.

=> English is spoken all over the world

3.Many rivers and lakes are poisoned.Factories produce waste and pour it into rivers and lakes. 

=> Because factories produce waste and pour it into rives and lakes, many rivers and lakes are poisoned.

4.They provided food then cleared up the debris.

=> After they had provided food, they clearned up the debris.

Question VII :

1. B -> pollution

2. B -> won't dump

3. had had -> were having

4. destroyed -> are destroyed

Question VIII :

1. If teachers teach environmental issues at school, students will be more aware of protecting the environment

2. English is spoken all over the world.

3. Because factories produce waste and pour it into rivers and lakes, .many rivers and lakes are poisoned.

4. After they had provided food, they clearned up the debris.