`I`

1. B pollute `->` pollution

`->` water pollution: ô nhiễm nguồn nước

2. D will fine `->` fines

`->` If 1: If + S1 + Vs/es, S2 + will + Vinf

3. C since `->` for

`->` six weeks là khoảng thời gian nên dùng "for'

4. B destroyed `->` were destroyed

`->` Câu bị động quá khứ đơn: S + was/were + Vpp

5. B published `->` was published 

`->` Câu bị động quá khứ đơn: S + was/were + Vpp

`II`

1. The author felt unsafe when she saw the power lines.

2. Because she thought they might fall down.

3. She was busy with her assignments that she didn't tidy her rooms for 2 weeks.

4. Looking the messy room caused her so much stress that she didn't want to study.

`VI.`

`1.` B 

+) Sửa: pollute `->` pollution

+) Lí do: Trước tobe cần một danh từ.

`2.` D

+) Sửa: will fine `->` fines

+) Lí do: Câu điều kiện loại 1

`3.` C

+) Sửa: since `->` for

+) Lí do: for + khoảng thời gian | since + mốc thời gian

`4.` B 

+) Sửa: destroyed `->` were destroyed

+) Lí do: Bị động quá khứ đơn: was/were Vpp.

`5.` B

+) Sửa: published `->` was published

+) Lí do: Bị động quá khứ đơn: was/were Vpp.

`VII.`

`1.` The author felt unsafe.

`2.` Since he thought they might fall down.

`3.` She was busy with her assignments.

`4.` When she looked at her messy room, it caused her so much stress that she did not want to study.