完形填空。 How did we help to save our earth this week? Let me tell you. First, my family tried to save electricity (电). We never left the lights 1 when leaving the room. We 2 the TV when nobody was watching it. Mum only used cold water in the washing machine. Second, we started recycling (回收) this week. We tried to write on 3 of our paper, no just on one side. We also divided our rubbish into 4 bags for bottles, paper and food. Mum kept the plastic shopping bags from the supermarket to use them again as rubbish bags. Third, my family started to save 5 . We stopped 6 long baths and had short showers (淋浴) 7 . We washed toilet with used water. Mum and dad used less water to do the washing. My sister and I didn't leave the tap (龙头) running when we brushed our teeth. At last, mum and dad began to save gas (汽油). Mum used to 8 us to school, but now my sister and I started riding our bikes to school. It's hard work 9 good exercise! This week dad and a few of the people in his company also started to go to work in one car and share the 10 . These are great ways to help protect our environment. (     )1. A. out (     )2. A. turn up (     )3. A. any side (     )4. A. large (     )5. A. electricity (     )6. A. to use (     )7. A. again (     )8. A. drive (     )9. A. or (     )10. A. pay B. on B. turn on B. all sides B. small B. food B. making B. instead B. order B. but B. value C. off C. turn down C. neither side C. different C. water C. to have C. already C. show C. for C. cost D. behind D. turn off D. both sides D. the same D. paper D. taking D. too D. carry D. and D. price