III

1.If you're vegetarians, you won't eat meat.

2.If you live in a cold country, you won't like hot weather

3.If you're a teacher, you will work very hard.

4.If you do a lot of exercise, you will stay fit and healthy.

5.If you're a mechanic, you will understand the engines.

IV.

1.send/will come

2.won't understand/whisper 

3.won't survive/don't take

4.press/will save

5.will cross/fly

6.will/is having

7.wears/won't stay

8.touch/won't scream

9.will forget/don't phone

10.will remember/give

EZ:|

III.

1. If you're a vegetarian, you shouldn't eat meat.

2. If you live in the country, you won't like hot weather.

3. If you're a teacher, you have to work very hard.

4. If you do a lot of exercise, you can stay fit and healthy.

5. If you're a mechanic, you will understand engines.

IV. 

1. send/will come

2. will not understand/whisper.

3. will not survive/do not take

4. press/will save

5. will cross/fly

6. will answer/has

7. wears/will not stay

8. touch/will not scream.

9. will forget/do not phone

10. will remember/give