7.我不喜欢科学,因为它太难了.（too） 　　Idon'tlikesciencesinceit'stoodificult. 　　8.Maria喜欢在周日早晨晚起. 　　MarialikestowakeuplateonSundaymorning. 　　Treesreduce(减少)sound_pollution_forlargeurban(城市的)areas.(pollute) 　　*pollution是名词n. 　　Itis_natuaral_foracattocatchmice.(nature) 　　*natural是形容词adj. 　　Themoretreeswegrow,the__purer____airitwillbe.(pure) 　　*purer比较级 　　Manypeoplearestill_living__evenafteranearthquake.(live) 　　*be+adj./v.ing 　　Treescanprotectthemselvesbyproducingaspecialchemical.(划线提问) 　　*木有画线... 　　提问Howdotreesprotectthemselvesby? 　　Henryiswriteonbothsidesofhispaper.(改成否定句) 　　*原句应该是Henrywritesonbothsidesofhispaper. 　　否定Henrydoesn'twriteonbothsidesofhispaper. 　　Maryisverywarm-hearted.（改成感叹句） 　　感叹____How_____warm-hearted___Maryis! 　　*How+adj.What+n. 　　ps...好好学习,天天进步~都是有一定规律滴说=)