英语翻译The bicycle is one of the simplest yet most useful inven

自行车是世界上最简单但也是最有用的发明之一.What is the most surprising is that it was not (41)___earlier,although the great inventor Leonardo da Vinci had drawn pictures for bicycles and also for flying machines and some other things.什么是最令人惊讶的是,它不（41）___earlier,虽然伟大的发明家达芬奇曾提请自行车图片等,也用于飞行器和其他一些东西.Those things were not produced (42)___ long after he died.A person riding a bicycle uses (43)____ energy to make the bicycle move,and there is no pollution at all when you are riding.这些事情都没有产生（42）___后不久就死了.一个人骑自行车使用（43 )____能量,使自行车移动,并有没有污染,所有当你骑.Even so,in developed (44)___,most people don't travel to work by bicycle.即便如此,在发达国家（44 )___,大多数人不骑自行车旅行的工作.It is not because the bicycles are expensive or people feel (45)_____ if they ride to work.这是不是因为自行车是昂贵或人的感觉（45 )_____如果他们上班的路上.It's because (46)____ cars on the roads becomes larger.这是因为在路上（46 )____车变大.It certainly becomes (47)____ to ride a bicycle.这当然就变成了（47 )____骑自行车.As a result,more people put their bicycles away and go to work (48)____ their cars.因此,越来越多的人离开,并把他们的自行车去上班（48 )____他们的汽车.And in this way,the situation is made more serious.而在这样的形势就变得更加严重.(49)____ the best way to make riding safer and more popular is to create paths only for bicycles,and to make (50)____ so difficult and expensive for drivers to take their cars into the city that they will go back to using their bicycles.41.（49 )____的最佳途径,骑更安全,更流行的是创造只有自行车路径,并作出（50 )____司机等困难和昂贵的城市,考虑到他们会回到他们的汽车使用其自行车.41.A.invent B.inventing C.invented D.to invent 42.答：发明创造正乙D.去发明创造42.A.before B.when C.since D.until 43.答：前四后二时正至43.A.much B.quite a lot of C.very little D.many 44.答：多乙不少非常少四多长44.A.world B.countries C.land D.earth 45.A.世界各国C.土地乙四地球45.A.lucky B.glad C.sorry D.tired 46.答：幸运乙高兴长抱歉四累46.A.the number of B.a number of C.the kind of D.all kinds of 47.A的乙数一数三的47种四各种.A.safer B.more dangerous C.much dangerous D.safe 48.答：安全B.多危险正多危险D.安全48.A.by B.in C.use D.drive 49.乙答：在C中使用由四车道49.A.Hardly B.May be C.Perhaps D.Nearly 50.A.问题根本是五月三也许四近50.A.it B.them C.us D.that二是我们四认为他们正