. We can eat at home or, ________ you prefer, we can go to a restaurant.
A. when B. whether C. if D. which
2. I’m disappointed _________ people have spoiled this area.
A. that B. when C. if D. how
3. If we keep littering, the environment will become ____________ polluted.
A. environmentally B. effectively C. separately D. seriously
4. ________we were tired, we sat down beside the stream.
A. Because of B. If C. As D. And
5. Solar energy doesn’t cause __________.
A. pollution B. dynamite C. flood D. volcano
6. “ ___________” means a piece of land full of rubbish.
A. Junkyard B. Treasure C. Hedge D. Stream
7. I will be __________if she manages to sell that motorbike at a high price.
A. surprised B. bored C. advanced D. disappointed
8. My uncle is a/an ______. He often does research in his laboratory.
A. plumber B. scientist C. electrician D. environmentalist
9. I don’t know the meaning of this word. I must look it______ in the dictionary.
A. on B. up C. in D. at
10. A _____ is a person who installs and repairs things such as water pipes, toilets, etc.
A.plumber B. customer C. consumer D. electician
