I. Choose the suitable word or phrase (A, B, C, or D) for each blank: (3ms)

1. Are you looking _________ a cheap, clean, effective source of power that doesn’t cause pollution.

A.after B. for C. at D.in

2. A dripping faucet can _________water.

A. waste B. Garbage C. air pollution D. Treasure

3. The pipe will __________if there are some cracks.

A. conserve B. fine C. drip D. collect

4. There are some ___________on the ground because of the drought.

A. deforestation B. purpose C. environment D. cracks

5. Solar energy can be used on _________ days .

A. cloudy B.cloudless C. money D. fire

6. The sun can be an __________ source of power .

A. effective B. polite C.population D.deliberate

7. All buildings will be _______by solar energy.

A. hot B. heated C. dump D.conserved

8. ___________ doesn’t cause pollution .

A. environment B. crack C. solar energy D. environment

9 .The __________ is installed on the roof of a house .

A. solar panel B.dynamite C. pesticides D. solar energy

10. Solar energy is an effective _____.

A. pesticide B. medicine C. source of power D. dynamite