you / conserve energy / go to school or to work by...

Câu hỏi: you / conserve energy / go to school or to work by bus / turn off your electric devices / you are not using them.

A. As you want to conserve energy, go to school or to work by bus and so turn off your electric devices when you are not using them.

B. If you want to conserve energy, go to school or to work by bus together with turn off, your electric devices when you are not using them.

C. Suppose you want to conserve energy, go to school or to work by bus and turn off your electric devices when you are not using them.

D. When you want to conserve energy, you needn't go to school or to work by bus and turn off your electric devices when you are not using them.