1. Unit 13 It must belong to Carla.

2. 1 Write different forms of the words. Then add more to each group. v. — n. n. — adj. pollute— pollution fame— famous act— actionwood— wooden protect— protectionscience— scientific inspire— inspirationhealth— healthy build— buldingsouth— southern create— creationharm— careful

3. 1 Write different forms of the words. Then add more to each group. adj. — n.adj. — adv. different— difference slow— slowly important—importancewide— widely sudden— suddenly significant—singnificance real— reeally relevant—relevance brilliant— brilliance

4. 2 Match. Statement The river used to be so clean. We have seen many changes in the environment. People should take public transportation more. The river is polluted by factories. The air pollution is gett ing worse and worse. Grammer Present progressive Modal verbs Passive voice used to Present perfect

5. Kinds of pollution Ways to cut down water pollution ask factories not to throw wast into the river; remind people not to litter land pollution ensure that factories throw away industrial wast in a responsible way;try not to use plastic bags when shopping 3. write ways to cut down on these kinds of pollution.

6. Kinds of pollution Ways to cut down noise pollution build airport away from places where people live air pollution encourage people to use public transportation instead od driving; reduce the number of factories that bure coal

7. 1. My alarm clock doesn’t work. It needs ______. A. to be repairedB. repair C. to repairD. for repairing 2. His death was _____ by a high fever. A. spread B. caused C. got D. showed 3. His mother ____ a worker in that factory. A. used to beB. used C. used to beingD. used be 4. —Your classroom is very clean. —Sure. It ________ after school every day. A. is cleaned B. cleans C. cleaned D. is cleaning

8. 1.Write a letter to the local goverment, raise the environmental problem and try to think out possible solutions. 2. 背诵 2b. Homework