Now, automakers _____________ fuels cells that extract hydrogen from gasoline. A. developed B. develops C. are developing D. will develop

The wind is a clean ______of energy. ( root/ source/ origin/ strong)

Remember to _____the lights before going to bed. A. turn B. turn off C. turn on D. stop

It often( snows/ is snowing/ snowing )in the mountains.

What should we do to _____________ water? ( cut/ take/ save/ waste)

Do not use more _____________ than what we need. A. wind B. food C. sunlight D. energy

____________ source of energy is the source that can’t be replaced after use. A. enewable B. Natural C. Effective D. Non-renewable

Biogas is and cheap for cooking and heating. A. plenty B. good C. serious D. expensive

Look! The students ______ soccer on the school yard . A. is playing B. are playing C. will play D. play

We are looking for cheap, clean and source of energy. (effective/ efficient/ serious/ dangerous)

Solar energy can be changed into _____________. A. electricity B. electric C. electrician D. electrical

When he ___________in, I___________ in the kitchen. A. comes / am cooking B. come / am cooking C. is coming / am D. comes/are

We should put on our roof for the heating and hot water. (solar energy/ equipment/ cracks/ solar pannels)