1. Choose the correct option.

(Chọn phương án đúng.)

1. The local government doesn't know _______ to do with the waste from a factory in the neighbourhood.

a. what

b. where

c. who

d. when

2. She is not aware of _______ she can communicate with to solve the environmental problems in the community.

a. what

b. where

c. when

d. who

3. Can you tell me _______ to discard these plastic bottles? Should I go to the recycling centre?

a. what

b. where

c. who

d. when

4. There is a blackout in my house. I don't know _______ to do with my work. I have a deadline tomorrow.

a. what

b. how

c. who

d. when

5. Is there any idea of _______ to dispose electronic waste? Do we have to send it somewhere?

a. why

b. how

c. who

d. when

2. Read the text. Circle the correct option.

(Đọc văn bản. Khoanh tròn lựa chọn đúng.)

If you do not know what to do with your clothes, here are a few tips for you:

1. You can swap your old clothes with your friends. Do you know who/when/where/what to swap with?

2. You can trade your clothes for cash at a local market. Do you know what/when/who/where to go?

3. You can donate your clothes to charity. Do you know who/what/where/when to do?

4. You can repair instead of replacing your wardrobe with new clothes. Do you know how/ where/who/what to do it?

5. You can send your clothes to recycling spots in your community. Do you know how/where/ when/what to go to?

3. Write the sentences based on the given words.

(Viết câu dựa trên những từ cho sẵn.)

1. We/not/know/who/support/ next campaign.

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2. I/not confident/how/reduce / carbon footprint/ our city.

________________________________________________________________

3. Teenagers / often wonder / what/do/future careers.

________________________________________________________________

4. Jack/cannot / decide / whether / recycle / or / dispose / these plastic bags.

________________________________________________________________

5. She asked/how/use/washing machine / her own house.

________________________________________________________________

4. Re-write sentences using question words and to-infinitive verbs.

(Viết lại câu sử dụng từ để hỏi và động từ nguyên thể có to.)

1. Many countries are struggling about what they should do to protect endangered animals.

________________________________________________________________

2. "When should we clean up the river near our house, Bình?", Trúc Anh asked.

________________________________________________________________

3. Tú Anh does not know where she could send her old clothes to recycle.

________________________________________________________________

4. Local people are wondering when they can use the sky train to travel around the city.

________________________________________________________________

5. I am not clear about different ways to save water.

________________________________________________________________

6. We must find out what we will do to protect our city from air pollution.

________________________________________________________________