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1、Unit2Unit2Topic2 All these problems are very serious.1 (1)We should do everything we can_(protect)the environment.(2)Ten years_(pass)since my father _(go)to America.(3)Have you noticed the man _(follow)us?(4)His father _(die)for many years.(5)His father _(die)many years ago.(6)Nobody would like _(se
2、e)waste paper _(lie)around in the classroom.(7)The answer is _ (complete)right.(8)There is a special kind oxygen _(call)ozone.2While I was walking down the street just now,I couldnt see anything.3“当.的时候”While she was listening to the radio,she fell asleep.她听着收音机睡着了。while 连词4 while 连词“虽然，尽管”While it
3、was late,he still went on working.虽然很晚了，但他还在继续工作。5 while 连词“只要”While there is life,there is hope.只要有生命，就有希望。6 while 并列连词“然而”（表示对比）He is strong while his brother is weak.他很强壮，然而他的兄弟却很瘦弱。7 while 名词“一会儿”She rested for a while.她休息了一会儿。8People have cut down too many trees.9 cut 相关词组cut down 砍倒；减少cut up 切
4、碎cut off 切断；切除cut.into 把.切成.101.They the big tree.2.He the apple halves.3.The electricity had been .4.He the meat on his plate.cut downcutsintocut offcuts up11A lot of rich land has changed into desert.12 change into变成.Ice has changed into water.冰变成了水 13A lot of rich land has changed into desert.141
5、.a lot of,lots of,plenty of=many/much (可不可都行）2.a great deal of=much3.a (large)number of=many15Trees can stop the wind from blowing the earth away.They can also stop the water from washing the earth away.16Trees can stop the wind from blowing the earth away.They can also stop the water from washing t
6、he earth away.17 阻止.做.stop.(from)prevent.(from)keep.from 18They stop her(from)cutting the trees.They prevent her(from)cutting the tree.They keep her from cutting the trees.19Although we have built The Green Great Wall,we still need to do something to protect the environment.20-Kangkang,read this art
7、icle.-Whats it about？21-This film is popular,whats it about?-Its about.22But the government is doing something useful to protect the environment.Dont spit anywhere in public.We should do everything we can to protect the environment.23some-thingany-oneno-bodyevery-where 复合不定代词/副词24Everything goes well.She didnt say anything.I have something important to tell you.I want something to drink.25Thats great.None of us likes pollution.26None of the books is/are interesting.None of the money is his.27We shouldnt leave rubbish here and there.Dont spit anywhere in public.28