I: Put the words or phrases in the right order to make sentences.
1. If/ is polluted/ fish/ the river/ will die.
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2. We/ recycle/ rubbish/ should/ try to.
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3. Don't throw/ plastic bags/ the/ because/ can reuse them/ you.
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4. You/ should/ when/ use reusable bags/ you go shopping
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5. If/ there/ people recycle more/ pollution/ will be less.
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II. Write conditional sentences from these statements.
1. We will plant more trees. The air will be fresher.
If......................................................................................................................
2. We will use fewer cars. We will reduce pollution.
If..........................................................................................................................................................
3. We will cycle to school every day. We will keep fitter.
If..............................................................................................................................................................
4. We will use recycled products. We will save money.
If..........................................................................................................................................................
5. The boy eats so many green apples. He will be ill.
If..........................................................................................................................................................
6. We will use reusable bags for shopping. We will reduce waste.
If..........................................................................................................................................................
7. She doesn't hurry. She is late for school.
If............................................................................................................................................................
8. You don't water the plants. The die.
If.............................................................................................................................................................
27. If we all use ______ bags, we'll help the environment.
A. reusable B. new C. beautiful D. dirty
28. Our family ______ to the new house next week.
A. will move B. moves C. move D. moved
29. If we ______ trees, our school ______ greener.
A. will grow/ is B. grow/ will be C. will grow/ are D. grow/ is
30. People ______ the environment if they ______ old items.
A. saved/ use B. save/ will use C. will save/ use D. save/ use
31. If they ______ an airport here, it ______ very noisy.
A. builds/ be B. build/ will be C. built/ is D. will build/ is
32. If the weather _______ sunny, I _______ to the zoo tomorrow.
A. is / go B. is / will go C. are/ go D. are / will go
33. Last night, I ________ out for dinner with my friends.
A. went B. go C. am going D. goes
34. The robot will help me to ______ the dogs and cats.
A. go B. feed C. swim D. make
35. What can an ________ helps us to do? - It can help us to cook rice.
A. fridge B. smart TV C. computer D. electric cooker