1.Gas and oil _____ always increases in cold weather.

A. consumers                B. consume                         C. consumption        D. consumable

2. Wind is a _____ source of energy.

A. renewable                     B. non-renewable            C. renewed                D. renewing

3. This country needs _____ in education.

A. investing                     B. investment                    C. invested                D. invest

4. _____ energy doesn’t cause pollution.

A. Social                           B. Solar                          C. Sociable                D. Sunny

5. The water _____ crises continue to impact on most parts of the country.

A. shortage                B. lack                        C. absence                D. scarce

6. Non-renewable _____ sources like coal and natural gases produce a lot of carbon dioxide.

A. power                B. fuel                        C. solar                D. energy