4. does

PART 4.

I.

1. A

2. B

3.D

4. D

5. C

II.

1. a

2. from

3. mountain

4. like

5. colours 

PART 6.

I.

1. English is spoken as the second language in Singapore.

2. This exercise can be done in 5 minitues.

3. If we don't waster paper, we will save many trees

4. Hoa told Tom that they were having a wonderful time in Da Lat then.

II.

1. I have seen him before he saw me.

PART 2

I.

1. A

2. C

3. C

II.

1. D

2. C

PART 3.

1. B

2. A

3. A

4. D

5. D

6. C

II.

1 was listening

2. has already known

3. was built

4. plays

PART 4.

I.

1. A

2. B

3. D

4. D

5. C

II.

1. a

2. from

3. mountain

4. like

5. colours

PART 5.

1. Nhi said that they would communicate using telepathy the next year.

2. We didn't go camping yesterday because it rained heavil.

3. The room was cleaned yesterday.

4. If we don't don't waste paper, we will save may trees.

II.

1. This time next week, I will be lying on Phu Quoc Island.

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$\text{~ Nếu được thì cho mk trả lời hay nhất nha! ~}$