問題詳情：
Nowadays, we don't have enough resources to use. So it's everyone's duly to save them for the future. To save resources, we should____.
①throw away a pencil without completely using it
②collect waste things for recycling
③go to school by kike instead of by car
④turn off the tap while brushing our teeth
⑤keep the lights on day and night
a . ①②⑤ b . ②③④ c. ②④⑤
【回答】
B
知識點：其他
題型：選擇題
