II.

1. leave - is covered

2. use - will become

III.

1. shortage

2. unsuccessful

3. surprising

4. extremely

IV.

1. I suggest collecting plastic bags.

2. He will give up smoking if his son asks him to do it.

3. The waiter wasn't very nice, but the food was delicious.

4. He was glad that all his classmates came to the stadium to support his team.

II.

1. When the trucks of food leaves the place, the ground will be covered with trash yesterday morning

2. If we use too much pesticide on vegetables, the vegetables will become poisonous and inedible

III.

1. shortage

2. unsuccessful

3. surprising

4. extremely

IV.

1. I suggest collecting plastic bags.

2. He will give up smoking if his son asks him to do so.

3. The food was delicious but the waiter wasn't very nice.

4. He was glad that all his classmates came to the stadium to support his team.