Section V: 

1. The dirt on vegetables can make you sick.

2. Scientists say that life started in the ocean.

3. He gave up smoking 2 years ago.

4. He is a fast runner. He runs fast.

5. Can I borrow your pencil? I'm sorry. I'm using it.

6. You should keep silent when they are working.

7. How many times a day do you brush your teeth?

8. Long is worried because he has to see the dentist.

Section I: 

1. F   2. F   3. T   4. T    5. F   6. T

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V:

1. cause ⇒ make

2. the ⇒ ∅

3. to smoke ⇒ smoking 

4. fastly ⇒ fast 

5. lend ⇒ borrow 

6. silently ⇒ silent 

7. in ⇒ ∅

8. has ⇒ has to 

I: 

1. F

2. F   

3. T   

4. T    

5. F   

6. T

Chúc bạn học tốt !!!