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

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.