Unit 15 Were trying to save the manatees Section A 3a-4 self-check一、学习词汇1.写出描写动物外貌的形容词 2.写出描写动物性格的形容词3.用单词的适当形式填空1.Manatees are _(endanger).We should care for them.2.Tigers are very strong and _（挑衅）.3.There are a lot of _(interest) plants in the river.4. Monkeys are _ (noise) than bears.5. _(fur）animals grow long coats in winter.6. I like animals that are the _ (play).7. Cheetahs are _ (spot) animals which live in forests.8. _ (袋鼠) live in Australia.4.读短文，完成任务。Kate is _building a new zoo in their town.zoos are _places for animals to live in. She has visited a lot of zoos _her life, she has never seeone that was _ for animals to live in. Last week,she visited a zoo and couldnt believe _ she saw. The animals are _in tiny cages and can hardly move at all. However , Alice thinks zoos are important places. They are like _textbooks for young people.They provide homes for many _animals,and help to educate the public about _ for them, so she _ all of us to visit zoos. a) 根据听力完成短文。b) 找出下列短语，掌握并学会运用。1） 适合 2）为某人提供某物3） 教育公众关爱动物4） 强烈要求某人做5） 反对做某事6).关爱7)一辈子8)活的教科书5.用方框中所给的单词或短语的适当形式完成句子provide, recycle, urge, care, pull down, turn off, work ,build1.We should help to educate the public about _ for animals.2.Why not _ waste paper, bottles or cans to protect our environment.3. _ the lights when you leave the room.4. That apartment is old and dangerous. It should be _.5. So far ,the government _ much food for poor people.6. We _ on the farm these days.7. His mother _him to study hard every day.8. The house they live in _ out of trash last year.二、 要点探究。看例子总结。1.Like v.喜欢 prep. 像a. Why does he like koalas? Because theyre kind of cute and friendly.b. What does African elephants look like? It is very enormous and gray.c. What are polar bears like? Theyre aggressive(挑衅的).d. I am like koalas because I like sleeping during the day.2.weigh 重 v. 重量 n. weight1.The manatee _about 1,000pounds.2.Do you know the _ of the manatee 3.pollutev. 污染polluted 过去式，过去分词，adj.被污染的pollutionn. 污染a. 污水b. 水污染c. 被污染的空气d. 空气污染4.总结所填短语的用法a. The walls old glued glass bottles last year.b. The model toys must _Amy for a year.c. Glass _ beautiful glasses.d. A number of new bikes _Shanghai tomorrow.根据以上练习总结被动语态结构被动语态：表示主语是动作的承受者。构成: 主语+ be + done 一般现在时态 am/is/are + done 一般过去时态 was/were + done 一般将来时态 will + be+ done 情态动词的被动 can/may/must/should + be +done三、课堂提高练习。选择正确答案。Can you use the keys to do the following exercises? 1. Quite a few trees _ because of buildings every day. A. cut down B. are cut down C. is cut down D. were cut down2. In our city ,a number of old buildings _ last year. A. destroy B. were destroyed C. is destroyed D. will be destroyed3. Its reported that more new buildings _in our school in one year. A. was built B. will be built C. has built D. will built4. The lake must _ because lots of fish died .A. pollute B. be pollutedC. are polluted D. is polluted5. His bike _ new. A. likes B. is like C. looks D. look like6. She _ her mother because she is kind and intelligent.A. look B. liked C. is like D. look like7. Do you know the way to _ the elephant in the old days? If you dont, you can read the story of “Cao Chong _ the elephant ”.A. weight; weighs B. weigh; weighs C. weight; weight D. weigh; weight8. The bridge is made _ stones _the old workers.A. from, in B. with, by C. of, by D. into, ofHomework1. Revise the important points of this class and rememeber them.2. Finish some exercises.3