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11. Use the box to fill each gap with the right word or phrase.environment programmesingle-usereducecarbon footprintpollutionHoàn thành mỗi câu bằng một từ hoặc cụm từ trong khung.

1. Ms Green says that our school ___ starts next month.environment programmesingle-usereducecarbon footprintpollution
2. Switching off the fans helps us to ___ the electricity we use.
3. ___ from the factory made the air smell terrible.
4. A straw that you use once and then throw away is a ___ product.
5. Your ___ shows how much carbon dioxide your activities send into the air.

22. Match each term in column A with its definition in column B. BNối mỗi thuật ngữ ở cột A với định nghĩa của nó ở cột B. B a. tác hại gây ra cho nước, không khí hoặc đất bởi những thứ bẩn hoặc độc hại b. chăm sóc thiên nhiên và giữ cho thiên nhiên được an toàn c. một cộng đồng sinh vật và môi trường xung quanh phụ thuộc lẫn nhau d. các loài động vật có thể biến mất mãi mãi nếu không ai giúp e. nơi ở tự nhiên của một loài cây hoặc con vật

1. 1. ecosystemchọn…a. harm done to water, air or soil by dirty or poisonous thingsb. looking after nature and keeping it safec. a community of living things and their surroundings that depend on one anotherd. animals that may disappear for ever if nobody helps theme. the natural home of a plant or an animal
2. 2. pollutionchọn…a. harm done to water, air or soil by dirty or poisonous thingsb. looking after nature and keeping it safec. a community of living things and their surroundings that depend on one anotherd. animals that may disappear for ever if nobody helps theme. the natural home of a plant or an animal
3. 3. habitatchọn…a. harm done to water, air or soil by dirty or poisonous thingsb. looking after nature and keeping it safec. a community of living things and their surroundings that depend on one anotherd. animals that may disappear for ever if nobody helps theme. the natural home of a plant or an animal
4. 4. environmental protectionchọn…a. harm done to water, air or soil by dirty or poisonous thingsb. looking after nature and keeping it safec. a community of living things and their surroundings that depend on one anotherd. animals that may disappear for ever if nobody helps theme. the natural home of a plant or an animal
5. 5. endangered specieschọn…a. harm done to water, air or soil by dirty or poisonous thingsb. looking after nature and keeping it safec. a community of living things and their surroundings that depend on one anotherd. animals that may disappear for ever if nobody helps theme. the natural home of a plant or an animal

33. Fill each gap with the best choice from the box.ecosystemendangered specieshabitatcarbon dioxidecutting down treesHoàn thành mỗi câu bằng một từ hoặc cụm từ trong khung.

1. Many students at our school want to protect ___, so they raised money for a turtle rescue centre.ecosystemendangered specieshabitatcarbon dioxidecutting down trees
2. Forests take in ___ from the air and give out oxygen.
3. ___ for firewood destroys the homes of many birds and insects.
4. The monkeys lost their ___ when the forest was cleared.
5. A small pond where fish, frogs and plants depend on one another is a simple ___.

44. Pick A, B or C to finish each sentence.Chọn A, B hoặc C để hoàn thành mỗi câu.

1. Mum was cooking dinner ___ I was sweeping the yard.AuntilBwhileCafter
2. Wash your hands ___ you have touched the rubbish bin.AafterBuntilCwhile
3. Text me ___ you get home, so that I know you are safe.AwhileBas soon asCbefore
4. The children kept playing in the yard ___ it became dark.Aas soon asBuntilCwhile
5. Remember to lock the gate ___ you leave the house.AwhileBuntilCbefore

55. Match the beginnings with the endings to make complex sentences.Nối phần đầu với phần cuối để tạo thành câu phức. a. cho đến khi con rô-bốt đi được. b. ngay khi trời tạnh mưa. c. trong lúc mình đang tưới cây nhé? d. trước khi bạn khóa cửa lớp. e. khi bạn vào thư viện.

1. 1. The class will clean the playgroundchọn…a. until the robot could walk.b. as soon as the rain stops.c. while I am watering the plants?d. before you lock the classroom door.e. when you enter the library.
2. 2. Remember to switch off the fanschọn…a. until the robot could walk.b. as soon as the rain stops.c. while I am watering the plants?d. before you lock the classroom door.e. when you enter the library.
3. 3. You must show your cardchọn…a. until the robot could walk.b. as soon as the rain stops.c. while I am watering the plants?d. before you lock the classroom door.e. when you enter the library.
4. 4. Can you feed the catchọn…a. until the robot could walk.b. as soon as the rain stops.c. while I am watering the plants?d. before you lock the classroom door.e. when you enter the library.
5. 5. Our team kept workingchọn…a. until the robot could walk.b. as soon as the rain stops.c. while I am watering the plants?d. before you lock the classroom door.e. when you enter the library.

66. Choose the sentence that correctly combines the two sentences, using the word in brackets.Chọn câu nối đúng hai câu, dùng từ trong ngoặc.

1. The rain stops. We will go out to plant the trees. (as soon as)AWe will go out to plant the trees as soon as the rain stops.BWe will go out to plant the trees as soon as the rain will stop.CThe rain stops as soon as we will go out to plant the trees.
2. Farmers use water carefully. The dry season comes. (when)AFarmers use water carefully when the dry season comes.BFarmers use water carefully when the dry season will come.CThe dry season comes when farmers use water carefully.
3. Ben sorted the plastic. Grace washed the bottles. (while)ABen sorted the plastic while Grace washes the bottles.BWhile Ben sort the plastic, Grace washed the bottles.CBen sorted the plastic while Grace washed the bottles.
4. Mr Hung checked the bins. The volunteers left. (before)AMr Hung checked the bins before the volunteers leave.BMr Hung checked the bins before the volunteers left.CThe volunteers left before Mr Hung checked the bins.
5. The factory closed. Fish returned to the river. (After)AAfter fish returned to the river, the factory closed.BAfter the factory closed, fish returned to the river.CAfter the factory closes, fish returned to the river.