After driving for 20 miles, Jackson realized that he in the wrong direction. A．was driving B．drove C．had been driving D．had driven 题目和参考答案——青夏教育精英家教网—

题目内容

16．After driving for 20 miles, Jackson realized that he______in the wrong direction.

A．was driving B．drove C．had been driving D．had driven

练习册系列答案

一通百通小学毕业升学模拟测试卷系列答案

相关题目

The Princess and the Frog is a fairy musical that the days when Walt Disney was a person, not a brand.

A. was dated back to B. dates back to

C. has been dating from D. had dated from

第二节书面表达（满分25分）

假如你是高三学生李华，高三第一轮复习即将开始，你的朋友王林给你发e-mail ，向你征求这段时间复习备考的建议。请你根据以下提示并根据自己的体会，给王林回一封e-mail.

制定切实可行的计划。

注意学科的均衡发展，尤其要加强英语的学习。

听老师的话。

保持身体健康，精神放松；

注意：

词数100 左右；

可以适当增加细节，以使行文连贯；

格式已写好。

Dear Wang Lin,

________________________________________________________________________________________________________________________________________________________

Yours Sincerely,

Li Hua

When people lose legs after accidents or illnesses, emergency care and artificial limbs（假肢）often allow them to walk again. Newts （蝾螈） in the same situation, on the other hand, can grow limbs back on their own! Scientists have known for a long time that certain animals can re-grow limbs, but they haven’t quite figured out how these creatures do it.

Researchers have now come up with some new ideas. Their work may give people the ability to re-grow lost limbs. The researchers started with two simple experiments：when you cut a newt’s leg at the ankle, only the foot grows back；when you cut off a leg at the very end, the whole leg grows back. In both cases, the re-growth begins with stem cells. Stem cells can develop into nearly any type of cell in the body.

How do a newt’s stem cells know when to grow only a foot and when to re-grow a whole leg?

This question relates to another mystery. In newt’s, a cut-off leg will grow back only if the nerve bundle（神经束）in it also grows back , but if something prevents the nerve bundle from growing, the stem cells at the wound won’t re-grow a new leg.

In its study, a British team focused on a protein called n-AG. When the team prevented nerves in a limb from growing, but added the n-AG protein to stem cells in the limb, the limb still re-grew. That protein seems to guide limb re-growth. People have proteins that are similar to n-AG. Further research into these materials may someday help human limbs recover by themselves.

40. In the experiments, the researchers cut off a newt’s foot or leg to find out _____.

A. what stem cells were B. whether they would grow back

C. how long it would take to re-grow D. how they would re-grow

41. A newt will re-grow its leg if _____.

A. its ankle was cut off but the nerve bundle was good

B. its leg was cut off and the nerve bundle stopped growing

C. its leg was cut off and the nerve bundle could grow back

D. its ankle and the nerve bundle were cut off

42. What do the underlined words “these materials” refer to?

A. Nerve bundles and proteins. B. Proteins similar to n-AG.

C. Stem cells and proteins. D. Stem cells and nerve bundles.

43. The first sentence of the passage _____.

A. acts as a lead–in B. shows where researchers got their new ideas

C. states the author’s opinion D. describes the result of researchers’ studies

Nowadays many young people get into ____ habit of smoking in ____ public and can't kick it.

A. the; the B. / ;/ C. / ;the D. the;/

After graduation I’d like to find a job I can use what I have learnt at school.

A．whose B．which C．where D．that

One day, when I was a freshman in high school, I saw a kid from my class walking home. His name was Kyle. He was carrying all of his books. I thought to myself, “Why would anyone bring home all his books on a Friday? He must really be a nerd(书呆子).” So I shrugged my shoulders and went on. As I was walking, I saw some kids running at him, knocking all his books out of his arms and he landed in the dirt. His glasses went flying, and I saw them land in the grass about ten feet from him. I saw this terrible sadness in his eyes. I jogged over to him, and as he crawled around looking for his glasses, I handed him his glasses. He said, “Thanks!” There Was a big smile on his face. It was one of those smiles that showed real gratitude. I helped him pick up his books, and asked him where he lived, It turned out he lived near me, so I asked him why! had never seen him before. He said he had gone to a private school before coming to this school. I would have never hung out with a private school kid before. We talked all the way home. He turned a pretty cool kid. I asked him if he wanted to play football on Saturday with me and my friends. He said yes. Over the next four years, Kyle and I became best friends.

Graduation day arrived. Kyle was valedictorian of our class, so he had to prepare a speech for graduation. In his speech he said. “Graduation is a time to thank those who helped you make it through those tough years. I am going to tell you a story.” I stared at my friend in disbelief as he told the story of the first day We met. He had planned to kill himself over the weekend. He talked of how he had cleaned out his locker so his Mom wouldn't have to do it later and was carrying his stuff home. He gave me a little smile. “Thankfully, I was saved. My friend saved me from doing the unspeakable.” I heard the gasp go through the crowd as this handsome, popular boy told us all about his weakest moment.

45．What does the underlined word “valedictorian” in the second paragraph mean?

A．A graduate who delivers a farewell speech in a class.

B．A graduate who is the youngest in a class.

C．A student who is the most popular in a class.

D．A student who can not graduate on time in a class.

46．It can be concluded from the text that the author______.

A．was good at playing football in high school

B．had not liked to make friends with the students from private schools before

C．seldom helped others

D．did not study hard in high school

47．Not until the graduation day did the author know_______.

A．the real reason why Kyle carried all his books home the first day they met

B．Kyle was his best friend

C．Kyle enjoyed making speeches in front of the class

D．Kyle's many weaknesses

48．What does the author mainly want to express by telling this story?

A．A friend in need is a friend indeed.

B．Helping others is a Virtue.

C．Your action is powerful: with one small gesture you can change a person's life.

D．We should have a pity on the weak.

Part B: Reading Comprehension 20%

Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don’t mind carrying a heavy load, your backpack might also power your MP3 player, keep your cell phone running, and maybe even light your way home.

Scientists from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass., have invented a backpack that makes electricity from energy produced while its wearer walks.

The backpack’s electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearer’s back, and the whole pack moves up and down as the person walks. A mechanism with gears(传动装置) collects energy from this motion and transfers it to an electrical generator.

Surprisingly, the researchers found, people walk differently when they wear the springy packs. As a result, wearers use less energy than when carrying regular backpacks. Also, the way the new packs ride on wearers’ backs makes them more comfortable than standard packs.

The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. These people often rely on global positioning system(GPS) receivers, night-vision goggles(夜视镜), and other battery-powered devices to get around and do their work. Because the pack can make its own electricity, users don’t need to give up space in their packs to lots of extra batteries.

For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs aren’t on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!

65. The passage introduces a new kind of ______ backpack.

A. electronic B. electricity-producing

C. electron-generating D. electricity-controlling

66. The new backpack makes use of ______ to produce power.

batteries placed at the bottom of the frame

the motion of the pack while the wearer walks

energy the wearer consumes for carrying the pack

the collective motion of a mechanism and some gears

67. From the passage, we can infer that ______.

the backpacks of mountaineers may become smaller in the future

the new backpack can hardly be produced due to its potential danger

the new backpack will someday replace MP3 players and cell phones

the backpack will also provide electricity for lighting our houses

68. An enormous disadvantage of power-generating backpacks might be that ______.

they may stop working at any time

it takes quite a while to have the energy transferred

they may distract the wearer’s attention from road safety

they will be extremely heavy with the mechanism

22. Is the occasion near ______ we can practice our talents?

A. when B. which C. that D. What

试题分类