1．当你离开教室时，务必关灯。2．你一旦开始，就必须进行下去。3．如果你不快点，你就会误了火车。4．这个男孩说他曾经和一位美国人讲过英语。5．老师告诉我们英国英语与美国英语拼写方面有些不同。6．如果今天下午下雨的话，我就乘出租车去上学。1．当你离开教室时，务必关灯。2．你一旦开始，就必须进行下去。3．如果你不快点，你就会误了火车。Besuretoturnoffthelightswhenyouleavetheclassroom.Onceyoubegin,youmustgoon.You’llmissthetrainunlessyouhurryup.4．这个男孩说他曾经和一位美国人讲过英语。5．老师告诉我们英国英语与美国英语拼写方面有些不同。6．如果今天下午下雨的话，我就乘出租车去上学。TheboysaidhehadeverspokenEnglishtoanAmerican.TheteachertoldusthatthereweresomedifferencesbetweenBritishEnglishandAmericanEnglishinspelling.Ifitrainsthisafternoon,I’lltakeataxitogotoschool.介词填空练习：1Hesuddenlyreturned____arainynight.2_______theoldmanleadingtheway,wehadnotroublefindingthehouse.3Wehadafriendlychat_______themeal.4Englishhaschanged______centuries.5Hecanspeaktwootherforeignlanguages_________English.6Hewillbeback______aboutthreedays’time.7________theendoflastmonththerehavebeenthreetyphoons.onWithoveroverbesidesinSince8Wehadlearnedmorethan2,000newwords________theendoflastyear.9Heinsisted______metakinghershoppingyesterday.10_______thesightofitsmother,thebabystoppedcrying.11Iamtallerthanmyyoungerbrother_______onehead.12Whatwillyoudo_______theoldcomputer?Sellitorgiveitaway?13Nooneknowswhatourworldwillbe_______inamillionyears.byonAtbywithlike14Idon’tliketosleep_________thewindowopen.15Thisarticleissodifficultthatitis_________ourunderstanding.16______thistimenextyearyouwillhavebeenincollegeforayear.17Comeoutfrom_______thebed.Ihearyouaretremblingthere.18Suddenlyagoodideaoccurred_______me.withbeyondByunderto19_______theheatofthesun,nothingcouldliveontheearth.20Mostofthepeoplepresent_______thelecturewereuniversitystudents.Withoutat
