Unit 13 ”Were trying to save the earth!Self Check工. 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. We neverleft the lights 1 when leaving the rooms， We 2 theTVIwhen nobody was watching it.Second, we started recycling this week. We triedto write on 3 of our paper,not just on one side.We also divided our rubbish into 4 ， bags for bottles，Ppaper and food，Mom kept the Plasticshopping bags from the supermarket and use themagain as rubbish bags.Third, my family started to save 5 .Westopped 6 long baths and had short showers7 . We washed the toilet with used water. Mumand Dad used less water to do the washing. My sisterand I didnt leave the tap running when we brushed our teeth.At last,Mom and Dad began to save gas(汽油).Mom used to ”8 us to school, but now my sister and I started riding our bikes to school. It s hard work9 good exercise! This week Dad and a few of the people in his company also started to go to work inone car and share the 10 These are great ways to help protect ourenvironment.( B )1.A.out B. on必.寺 D. behind( D )2. A.turned up B. turned onCuturned dowa DLLturned off( D )3. A. any side B. all sidesC. neither side D. both sides(C )4. A.large B. smallC. different D. the same( C )S$. A. electricity B. foodC. water D. paperD )6. A. to useACC. to have)7. A. againC. already)8. A. driveCsho友)9. A. or人:二)10. A. payC. costB. makingD. takingB. insteadD. tooB,. orderD. carryB. butD. andB. valueD. price开. 阅读理解。Hundreds of years ago,jlife was much harder thanit is today. People didnt have modern machines then.There was no modern medicine,either.Life today is better than it used to be,but at thesame timelnewtDrobleams somelup. Onelof the biggestproblems 1s pollution。 Water pollution has made ourrivers and lakes dirty. It kills fish and pollutes ourdrinking water.， We have to talk louder because ofnoise pollution and it also makes us angry moreeasily、Air pollution is the most serious kind ofpollution. Its bad for all living things in the world.Cars,planes and factories all pollute our air everyday. Sometimes the polluted air is so thick that it islike a quilt over a city. This kind of quilt is calledSmoOg. Many. countries are making rules to fight againstpollution. Factories must deal with the waste waterbefore it is thrown away. They mustnt blow heavysmoke into the air.We need to do many other things. We can put thewaste in the dustbin instead of throwing it on theground. We can go to work by bus or with our friendsin the same car. If there are fewer people driving,therewill be less pollution.(C )11. Life was hundreds of years agothan it is today.Aricher B. busierC. harder Dreagsier 吾,72， pollution makes people angrymore easily.A. Water B. NoiseC. Ai D. Land( D )13. What does the underlined word “smog?”mean in Chinese?A.污水 B. 废气G.空难 D. 烟雾( B )14. 再ow Tiany Piecas 5f adviee are given in thelast paragraph?A. One. B. Two.C. Three. D. Four.( C )1S$. From the passage we can learn thatA. today people dont have to talk to eachother in a loud voiceB. water pollution is the most serious kindof pollutionC.manycountries are.making rules in orderto fight against pollutionD. factories make more money by dealingwith the waste water