1. healthily -> healthy

2. to -> for

3. it -> there

4. for -> to

5. to turn -> turning

6. many -> much

7. hardly -> hard

8. does -> is

9. were -> did

10. extreme -> extremely

II.

1. His mother is 1.60m tall, 10cm shorter than his father.

2. It's good for your health to do exercises regularly.

3. Don't forget to turn off the lights before you go to bed.

4. She's a good friend of ours.

5. How wide is your room?

6. It took us two days to find the book.

7. He doesn't like chicken. Neither do I.

8. It's such a boring film that we leave the cinema soon.

9. Our teacherS don't let us talk in class

10. My friends paid a visit to HCM city two months ago.