50AACBC51--55BADDB四、56--60BAAAB61--65BCADC五、66-70EAFBD六、71.has?72.relaxing?73.cross?74.sixth?75.working78.photos?79.pass?80.essfully七、81.isfullof?82.signs?83.even?84.give?85.do88.for?89.seen?90.quickly八、91.stay/keepaway?92.part;unless?93.tried/did;best95.only;but?41--45ACDBB76.months’?77.gone86.how?87.writedown94.youmake/you’vemade九、?PollutionPollutioncanbeseenalmosteverywhere.ingoutthechimneys.Wecanseetheriverisnotcleananymore.Wecanseerubbishhereandthere.Air,water,rubbishandotherpollutionarebadforeverylivingthing.Asjuniorhighstudents,we’resupposedtodosomethingtohelpstoppollution.Weshouldrideourbikesortakethebustoschoolinsteadofdriving.Whenwegoshopping,we’dbettertakeabag.Beside,we’resupposetosorttherubbishbeforewethrowitout.Allinall,there’smuchwecandotohelpstoppollution.Let’stakeactionnow!