1. If you press the button, what ____________?A. would happen B. happens C. will happen D. happen

30. Please collect all recyclable materials, and take them to the ____________ factory. A. recycle B. recycled C. recycling D. recyclable

6. Billions of____________ are thrown away every year all over the world. A. cans B. bottles C. cups D. glasses

29. If you have old clothes, will you give them to those ___________?A. needs B. to need C. in need D. for needing

10. If she ____________, we will miss the bus. A. not hurries B. doesn’t hurry C. won’t hurry D. don’t hurry

15. We will buy____________ for our classA. water bottles B. recycling bins C. energy-saving lights D. refillable pencils

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

26 What can we do ____________ air pollution?A. reduce B. to reduce C. reducing D. to reducing

2. If I ____________ time, I ____________ you with planting that tree.A . had - helped B. will have – will help C. have – will help D. have – don’t help

5. Will you____________ please? A. open the garbage can B. hang the clothes C. empty the dustbin D. collect the bottles

4. People throw away millions of____________ every year. A. old car tires B. drink cans C. old newspapers D. household wastes

9. If you go out with your friends tonight, I ____________ the film on TV. A. watch B. watched C. am watching D. will watch