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1. Exercise 4. Choose the correct answer: A, B, C or D.

1. Let's go for a walk – __________ you look too tired.
A. unless
B. if

2. I will be back tomorrow __________ there is a plane strike.
A. unless
B. if

3. I think he would look prettier __________ he didn't wear so much make-up.
A. unless
B. if

4. We will be surprised __________ he doesn't have an accident soon.
A. unless
B. if

5. I am going to school this afternoon __________ it rains.
A. unless
B. if

6. I am __________.
A. am
B. have been
C. were
D. had been

7. Unless you don't stop drink milk tea, you will gain weight fast.
A. unless
B. if

8. Unless she was rich, she would spend all my time traveling.

9. __________?
A. went / would / do
B. good / done
C. had one / would have / done
D. did / do.