22. If people ____________ public transport, there will be less pollution.
A. use B. will use C. can use D. used
23. If I pass this exam, I ____________ to the university next summer.
A. went B. have gone C. will go D. goes
24. We will be late unless we ____________ now.
A. leave B. don’t leave C. had left D. have left
25. You will get a good seat if you ____________ first.
A. came B. come C. have come D. will come
26. What can we do ____________ air pollution?
A. reduce B. to reduce C. reducing D. to reducing
27. If people turn off all electric appliances in one hour all over the world, they can save lots of ____________.
A. electric B. electrical C. electrician D. electricity
28. Don’t throw rubbish ____________ the river because you will make it dirty.
A. into B. up C. at D. of
29. If you have old clothes, will you give them to those ___________?
A. needs B. to need C. in need D. for needing
30. Please collect all recyclable materials, and take them to the ____________ factory.
A. recycle B. recycled C. recycling D. recyclable
31. Your school is so green with lots of trees!
A. That's a good idea.
B. Congratulations!
C. There are many trees here.
D. Thank you. We're planting some more flowers.
22. If people ____________ public transport, there will be less pollution.
A. use B. will use C. can use D. used
23. If I pass this exam, I ____________ to the university next summer.
A. went B. have gone C. will go D. goes
24. We will be late unless we ____________ now.
A. leave B. don’t leave C. had left D. have left
25. You will get a good seat if you ____________ first.
A. came B. come C. have come D. will come
26. What can we do ____________ air pollution?
A. reduce B. to reduce C. reducing D. to reducing
27. If people turn off all electric appliances in one hour all over the world, they can save lots of ____________.
A. electric B. electrical C. electrician D. electricity
28. Don’t throw rubbish ____________ the river because you will make it dirty.
A. into B. up C. at D. of
29. If you have old clothes, will you give them to those ___________?
A. needs B. to need C. in need D. for needing
30. Please collect all recyclable materials, and take them to the ____________ factory.
A. recycle B. recycled C. recycling D. recyclable
31. Your school is so green with lots of trees!
A. That's a good idea.
B. Congratulations!
C. There are many trees here.
D. Thank you. We're planting some more flowers.