1Unit3♦重点短语根据汉语意思,写出相应的英文短语1.为……担心beworriedabout2.古代的森林ancientforest3.垃圾桶litterbins4.打扫,清洁cleanup5.参与到……中/在……中扮演角色playone’s/apart/rolein6.全世界allovertheworld7.为了inorderto8.同时atthesametime♦重点句型根据汉语意思完成句子,每空一词1.许多来森林的游客用小刀把他们的名字刻在树上。Manyvisitorstotheforestsuseknivestocuttheirnamesintothetrees.2.当地的村民已经帮忙清理森林。Peoplefromlocalvillageshavehelpedcleanuptheforests.3.我们希望游客们也参与到保持森林清洁的行动中来。Wehopevisitorswillplaytheirpartinkeepingtheforestscleantoo.4.节约水源就是拯救生命。Tosavewateristosavelives.