It’s too bad that I failed in the math exam. If only I hard at it! A. worked B. had worked C. has worked D. would work 题目和参考答案——青夏教育精英家教网—

题目内容

It’s too bad that I failed in the math exam. If only I ______ hard at it!

A. worked B. had worked C. has worked D. would work

B 考查虚拟语气。题意“我数学考试不及格真是太糟糕了，要是我之前努力学习就好了”。if only后面的从句中要用虚拟语气，从语境可知此处是对过去情况的一种虚拟，所以谓语动词要用过去完成时。故选B。

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A. for one thing B. for a thing C. although D. in one hand

——What about _________ job??　

——It’s too difficult _________ job for me.?

A. the; a 　 B. the; the C. a; the 　 D. a; a

Lie in bed, by an open window, and listen…
“No air conditioning? How can you sleep?” a friend asks, horrified. I tell her my family has decided to shut the air conditioner off and reduce our electric bill. On this first night of our cost-cutting plan, it’s only 85 degrees. We’re going to suffer, but the three kids complain anyway.
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【小题1】On the first night of the writer’s cost-cutting plan, her children ______.

A．live a comfortable life as usual

B．begin to be unhappy

C．are protected from the world outside

D．are about to die from the heat

【小题2】The author talks about her grandmother and her childhood to show that ______.

A．people used to live a hard life

B．people at that time were hardworking

C．it’s OK for people to live a simple life

D．she has learned a great deal from her grandma

【小题3】In the writer’s eyes, her children are ______.

A．free from parents’ protection

B．full of dissatisfaction with life

C．dependable because of parents’ love

D．lacking in real test of hardships in life

【小题4】Which of the following titles best suits the passage?

A．Waiting for the Breeze.

B．An Interesting Experience.

C．Life at Present and Life in the Past.

D．Different Times, Different Children

As any parent with an iPhone or an iPod Touch knows, mobile apps (手机软件) can be an engaging and entertaining experience for kids. Now, a new study of PBS Kids suggests that the experience can be an educational one as well.

The study, which was administered by PBS under a grant from the Department of Education, first tested the vocabulary level of a group of 90 Title 1 school children, aged 3 to 7. Then, the children were each given two weeks with an iPod Touch loaded with the Martha Speaks Dog Party app created by PBS Kids.

The study monitored how the children used the iPod, during what hours, and in what context. On average, the study found that kids played with the iPod Touch for a total of 5 hours across the two weeks, with half that time spent playing the Martha Speaks app. At the end of the two week trial, the children were given another vocabulary test, which revealed an increase in vocabulary acquisition by as much as 31 per cent.

The study findings are particularly useful as smart phones and mobile devices have become increasingly popular among families and parents are faced with a proliferation of mobile apps designed for kids. According to a recent Nielsen study, smart phone usage is 12% higher in households with children than other households.

“Mobile apps can be a great learning tool in the hands of children,” said Lesli Rotenberg, SVP, Children’s Media, PBS. “This research is important in helping to better understand and guide the development of new apps that improve the value of children’s screen time with significant educational outcomes.”

So what does it all mean? Well, at the very least it will help parents get over that guilty feeling when they hand over their iPhone or iPod Touch for a little peace and quiet. At best, it provides more evidence that mobile devices and apps do indeed have educational value and could be an important part of the child-learning process for many years to come.

1.What Lesli Rotenberg said in the fifth paragraph suggests that .

A. he has a positive attitude towards mobile apps

B. he thinks children should never use smart phones

C. he is doubtful about mobile apps designed for children

D. he thinks parents should be careful with mobile apps for children

2.The underlined sentence in the last paragraph implies that .

A. parents will feel more comfortable giving kids iPhone or iPod Touch

B. parents will know what kind of mobile phones are suitable for kids

C. parents will know what children do with mobile phones

D. parents can watch over their children now and then

3.What would be the best title of the text?

A. The popularity of smart phones among kids

B. The entertaining function of smart phones

C. Smart phones make kids learn more.

D. It’s too early for kids to use smart phones

Astronomers have captured(捕获) the first direct image of a planet being born.

Adam Kraus, of the University of Hawaii’s Institute for Astronomy, said the planet is being formed out of dust and gas circling a 2-million-yea-old star about 450 light years from Earth.

The planet itself, based on scientific models of how planets form, is believed to have started taking shape about 50,000 to 100,000 years ago.

Called LkCa 15b, it’s the youngest planet ever observed. The previous record holder was about five times older.

Kraus and his colleague, Michael Ireland from Macquarie University and the Australian Astronomical Observatory, used Keck telescopes on Mauna Kea(a volcano on the island of Hawaii, US) to find the planet. Kraus presented the discovery Wednesday at NASA’s Goddard Space Flight Center in Maryland.

Observing planets while they’re forming can help scientists answer questions like weather planets form early in the life of a star or later, and whether they form relatively close to stars or father away.

Planets can change orbits(轨道) after forming, so it’s difficult to answer such questions by studying older planets.

“These very basic questions of when and where are best answered when you can actually see the planet forming, as the process is happening right now,” Kraus said.

Scientists hadn’t been able to see such young planets before because the stars they’re circling around outshine(光亮强过) them. Kraus and Ireland used two techniques to overcome this problem.

One method, which is also used by other astronomers, was to change the shape of the telescope mirrors to remove light distortion(扭曲) created by the Earth’s atmosphere. The other method they used, which was unique, was to put masks with several holes over most of the telescope mirrors. The combination of these techniques allowed the astronomers to obtain high-quality images that let them see the planet next to the bright star.

The star LkCa 15—the planet is named after its star—was the team’s second target. They immediately knew they were seeing something new, so they plan to gather more data on the star.

1.The research on younger planets helps scientists _____________.

A. study why planets change orbits after forming

B. understand how planets move around their stars

C. answer questions about the age of stars and planets

D. know the relationship between planets and their stars

2.Why are young planets like LkCa 15b hard to discover?

A. Their stars are brighter than them.. B. They are very far from the earth.

C. They are generally too small. D. They rarely form.

3.According to the text, Kraus and Ireland _____________.

A. have been working in the same university

B. observed the planet on a volcano in Hawaii

C. used two new methods in the observation

D. cut holes in the mirrors when observing

4.Which of the following would be the best title for the text?

A. Youngest planet seen as it’s forming.

B. Planet 450 light years away discovered.

C. World’s first direct image of a planet taken.

D. New technique helps discover young planets.

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