if a train entered this tunnel,it would draw in fresh air behind it.这里为什么加behind

if a train entered this tunnel,it would draw in fresh air behind it.这里为什么加behind 新概念英语句子中过去时ed发音问题1、if a train entered this tunnl 2.failed to.3ordered several tons of.等等很多,根本听不到有ed发音, 在新概念第二册64课里的一个句子This would solve the problem of ventilation,for if a train entered the tunnle,it would draw in fresh air behind it.这里的DRAW .----Don't worry.we will be there on time.----___the train is late?A what if B If C Even if D What We'll go for a picnic if it__this weekendA.will rain B.rains C.doesn'train D.won't rain 急if a trian entered this tunnle ,it would draw in fresh air behind it.为什么用entered? a train travels faster than a coach.（同义句） a coach ___travel____fast___a train. luckily he entea train travels faster than a coach.（同义句） a coach ___travel____fast___a train. luckily he entered the schhool.(同义句)he____ ____to ___I can't catch the first train tomorrow morning?A.what about B.what if C.How if D.what to do Why don't you take a train? Excuse me ,can you tell me ______?A.dose the train leave B.If the train had left C,if the train leaves D.did the train leave 英语翻译翻译：If you don't hurry ,we'll miss the train .If it rains tomorrow ,we won't go to the seaside .If he sells that car ,he can buy a new one 英语翻译14.Term; Survival of Obligations.This Agreement will terminate upon the first to occur of (a) termination of discussions between the Parties concerning the Possible Business Arrangement (or if a business arrangement is entered into,upon t int t; if(a Do you think the thief entered through the garage door?——No,if he had,I don’t believe he _____the living room window.A.broke B.would have broken C.would break D.had broken Do you think the thief entered through the garage door?——No,if he had,I don’t believe _____broken the living room window.A.would he have B.he had C.he would have D.he has It doesn’t matter to me _____I miss my train,because there’s another one later.A.that B.if C.unless D.when If we don’t start out now, we must risk ________ the train．拜托了各位 谢谢A. miss B. missing C. being missed D. to miss If you hadn't entered collge ,what job would you like to have?用大约五六句话回答