1. If he doesn't eat breakfast, he will be hungry.

2. He won't be sad if his friends come to his birthday party.

3. If she has a lot of money, she will fly to Paris.

4. We will visit the Times Square if we travel to New York.

5. If Alvin forget his homework, he will get low mark.

6. If you don't wash the apples carefully, you will have a stomachache.

1. If he don't eat breakfast, he will be hungry

2. He won't be sad if his friends come to his birthday party.

3. If she has a lot of money, she will fly to Paris.

4. We will visit the Time Square if we travel to New York.

5. If Alvin forget the homework, he will get low mark.

6. If you don't wash the apples carefully, you will have a stomatchade.

Bài 6: 

1e

2a

3c

4b

5d