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9. The park is dirty because many people ______ litter on the paths.
A. make B. drop C. keep D. hold
10. The club is ______ by the Youth Union in my school.
A. cleaned up B. picked up C. based on D. set up
11. I think we are all able ______ a lot of things to protect our environment.
A. to do B. do C. coding D. to doing
12. Students are ______ to pick up litter that they see on the ground.
A. raised B. attracted C. reminded D. decided
13. Eco-friendly car models always attract great ______ at exhibitions.
A. attend B. attention C. attentive D. attentively
14. One of the most important ______ of energy is the Sun.
A. resources B. bases C. roots D. sources
15. They have already ______ a decision that they are going to buy a new house next month.
A. had B. made C. taken D. got

V. Fill in the blanks with suitable prepositions
1. It takes many years to break ______ plastic bags so we should use other materials instead.
2. “Cutting down ______ private cars!” is the slogan for our campaign this month.
3. ______ conclusion, each of us should be responsible for what we are doing with the environment.
4. Many people think living green is compulsory ______ them and they try to follow it.
5. In the workshop some students gave presentations ______ how people are damaging the climate and environment.

VI. Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions.
1. Encouraging students ______ planting more trees or flowers in schools helps reduce CO2 and make the air clean.
A B C D
2. We can improve the environment in our school ______ many ways and even small actions can make a big difference.
A B C D
3. You may search ______ information about climate change on the Internet for your presentation.
A B C D
4. The research ______ carbon footprint can be based in how much electricity household appliances use.
A B C D
5. My father has been working for ______ an electric company for more than 20 years.
A B C D

C. GRAMMAR: I. Give the correct forms of the verbs in brackets
1. Tommy (be) ______ fifteen years old next month.
2. Look at the Sun. It (be) ______ a beautiful day.
3. David (buy) ______ a new car. He has already saved enough money.
4. I think that Thompson (lose) ______ his job because of his rude behavior.
5. You (cook) ______ for the party? I see a lot of ingredients in the kitchen.
6. I promise I (call) ______ as soon as I arrive at the airport.
7. We (hold) ______ an international conference about environmental issues next week as planned.
8. I forgot to phone Dad. I (do) ______ it right after lunch.
9. People (not go) ______ to Mars before the 22nd century.
10. Linda and her best friends (take) ______ this trip for more than one month.

II. Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
1. beautiful dress ______ for me by my mother last week.
A. is made B. was made C. will be made D. has been made
2. Those flowers and plants ______ every day.
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