21世纪英文报八年级上(745期)Howfastcanhumansrun巩固练习题.docx
二 写出以下动词的过去时和过去分词。动词原形过去时过去分词becomesetmadebrokenhitgetwent二.翻译.苏炳添是世界上跑得最快的人之一。1 .这是厦门最贵的餐厅之一。2 .她曾经是世界上最富有的女人之一。3 . Break the chocolate into small pieces and melt it over a gentle heat.4 . Give him a break, he's just a little boy.5 .这辆车的最高时速是180mph.6 .人口正在快速增长。（great speed）三.选择题。1. A car is traveling a speed of 50mph.A. of B. in C. on D. at2. eye exercises is good for your eyes.A. DoingB. Do C.Does3. is difficult for me.A. ClimbB. Climbing C. Climbs4. Smoking is to your.A. harm, health B. harmful, healthy C. harmful, health5. If we use force, we can hurt our legs.A. too many B. too much6. She struggled to her tears.A. held back B hold C. hold back7. It's that humans could finish the 100-meter sprint in just 5.6 seconds.A. possibleB. impossible8. Greenland shark is one of the longest-living in the world.A. animalB. animals四.听力练习Su Bingtian is one of men in the world.the 2020 Tokyo SummerOlympics, he set an（亚洲记录）of 9.83 seconds in the men's （100 米短跑）.He also became the first Chinese runner tocompete in the 决赛 of the event.the 10-second markis a big thing for the world's top runners. Jamaican runner Usain Bolt set the event's top record 2009 with a time of 9.58 seconds. This him the world's fastestrunner. But just how fast can humans run? Is there a（极限）to our topspeed?People（曾经认为）that our legs can only take a certain amount of force when they hit the ground. We can hurt our legs if we use（too many, too much） force. In that case, the fastest possible time in the 100-meter sprint would be9.48 seconds, in theory （理论）.But（根据）a 2010 study, our legs can handle alot more force. If we used our maximum （最大）force, we could run a speed of 64kilometers an hour. This means we could finish the 100-meter run in just 5.6 seconds!（然而）,the study says this is not possible.（即使）we usedour maximum force to run, we would be held back by our muscles，（月几肉的）speed. There are physical limits to how fast our muscles move. At a certain point, they hit their ''contractile （收缩的）speed limit”. This is what really limits our top speed, according to the study.BY MIKE FUKSMAN, 21ST CENTURY TEENS STAFF答案：一.写出以下动词的过去时和过去分词。动词原形过去时过去分词becomebecamebecomesetsetsetmakemademadebreakbrokebrokenhithithitgetgotgottengowentgone翻译1 .苏炳添是世界上跑得最快的人之一。Su Bingtian is one of the fastest men in the world.2 .这是厦门最贵的餐厅之一。This is one of the most expensive restaurants in Xiamen.3 .她曾经是世界上最富有的女人之一。She used to be one of the richest women in the world.4 . Break the chocolate into small pieces and melt it over a gentle heat. 把巧克力掰成小块，再用文火融化。5 . Give him a break, he's just a little boy.放过他吧，他还只是个小男孩。6 .这辆车的最高时速是180mph.The top speed of this car is 180mph.7 .人口正在快速增长。（great speed）The population is growing at a great speed.三.选择题。1. A car is traveling a speed of 50mph.A. of B. in C. on D. ateye exercises is good for your eyes.A. Doing B. Do C. Doesis difficult for me.A. Climb B. Climbing C. ClimbsSmoking is to your.A. harm, health B. harmful, healthy C. harmful, healthIf we use force, we can hurt our legs.A. too many B. too muchShe struggled to her tears.A. held back B hold C. hold backIt's that humans could finish the 100-meter sprint in just 5.6 seconds.A. possibleB. impossibleGreenland shark is one of the longest-living in the world.A. animalB. animals四.听力练习Su Bingtian is one of _fastest_men in the world. _At_ the 2020 Tokyo Summer Olympics, he set an _Asian record_（亚洲t己录）of 9.83 seconds in the men's 100-meter sprint_（100 米短跑）,He also became the first Chinese runner to compete in the _finalround决赛 of the event.Breaking_ the 10-second mark is a big thing for the world'stop runners. Jamaican runner Usain Bolt set the event's top record _in 2009 with a time of 9.58 seconds. This made him the world's fastest runner. But just howfast can humans run? Is there a limit（极限）to our top speed?People used to believe_（曾经认为）that our legs can only take a certain amount of force when they hit the ground. We can hurt our legs if we use（too many, too much） force. In that case, the fastest possible time in the 100-meter sprint would be 9.48 seconds, in theory （理论）.But _according to_（根据）a 2010 study, our legs can handle a lot more force. If we used our maximum （最大）force, we could run _at_ a speed of 64 kilometers an hour.This means we could finish the 100-meter run in just 5.6 seconds!However.（然而）, the study says this is not possible. Even if_（即使）we used our maximum force to run,we would be held back by our muscles'（月几肉的）speed. There are physical limits to how fast our muscles move. At a certain point, they hit their''contractile （收缩的）speed limit”. This is what really limits our top speed, according to the study.BY MIKE FUKSMAN, 21ST CENTURY TEENS STAFF微wa码，翻开小台
