题目内容

【题目】I ______ have worried before I came to the new school, for my classmates here are very friendly to me.

A. mightn’t B. mustn’t

C. needn’t D. couldn’t

【答案】C

【解析】

试题分析:句意:我来新学校之前本没有必要担心,因为在这里我的同学对我非常友好。needn’t have done本没有必要做某事,表示实际上已经做了某事。根据句意可知选C。本题考查情态动词。分析此题需抓住后句for my classmates here are very friendly to me.可知此处为本没有必要做某事,mightn’t也许不;mustn’t不允许;couldn’t不可能。再根据句意可以选出正确答案。

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【题目】Washington D.C.is the capital of the United States. It's the center of the national government. It's a busy,working city with a large population. But what is more,Washington is also a city of history and culture.

Washington was created in 1790,when Congress(国会)decided to place the nation's new capital in the east of the country. It was built halfway between the northern and the southern states of the America. And of course it was named after George Washington,the first President of the United States.

There are many tourist sights in Washington. One of them is the White House. This is the home and office of the President of the United States. Most visitors are,however,surprised by how small the White House actually is.

Washington is also a great culture city. The Library of Congress contains(包括)one of the largest library collections in the world. The Smithsonian Museum holds the nation's largest collection of cultural materials. And John F.Kennedy Center is a famous center of art and culture. It has many great musical and theatre performances throughout the year.

【1】The writer mainly talks about________.

A.Washington

B.the history of Washington

C.buildings and sights in Washington

D.the history and culture of Washington

【2】From the passage we know that Washington is situated(位于)in________.

A.the east of the USA

B.the center of the USA

C.the east,on the middle point from north to south of the country

D.the east and halfway away from the north

【3】The writer introduces Washington in the order(顺序)of ________.

A.general introduction,sights and history

B.general introduction,history,sights and culture

C.population,history and culture

D.history and culture

【4】It can be learned from the passage that________.

A.Washington is the largest city in the USA

B.Washington is also the center of economic in the USA

C.Washington is a young city

D.it is situated in the west of the USA

【题目】We live in a sweet world. The average American kid eats more than 20 teaspoons of sugar per day, and adults eat 50% more sugar today than they did in the 1970s. We all know that too much sugar isn’t good for you. But did we know it could be dangerous? A team of researchers at the University of Utah used mice to do a study on the bad effects of sugar. They found it could have serious effects on people’s health.

Sugar is found not only in sweets and candies, but also in many household items like pasta and crackers.

During the 58-week-long study, mice were fed a diet containing 25% more sugar. This percentage equals a healthy human diet along with three cans of soda daily. The team found that these mice were twice as likely to die as mice fed a similar diet without the sugar. Though the mice did not show signs of obesity or high blood pressure, male mice produced 25% fewer offspring (后代) than the other mice.

Scientists often use mice for research because they have a similar genetic (基因) structure to humans. “Since most substances (物质) that are dangerous in mice are also dangerous in people, it’s likely that those physical problems that cause those mice to have increased deaths also work in people,”says study author James Ruff of the University of Utah. Findings from this study show bad effects that are not as noticeable as weight gain or heart problems. Sugar can contribute to long-term changes in the body that can change development and even shorten lives.

Cutting sugar out of the American diet altogether may be difficult. But making the effort to control our nation’s sugar need will provide for a truly sweeter future.

【1】The study done by researchers aimed at learning about________

A. the advantages and disadvantages of sugar

B. the bad effects of sugar on people’s health

C. the genetic structure of mice

D. American’s eating habit.

【2】 According to the study, which of the following statements is wrong?

A. Sugar can even shorten lives.

B. Sugar’s bad effects are not noticeable.

C. Eating much more sugar can make mice put on weight and get high blood pressure.

D. Mice are more likely to die when fed a diet containing 25% more sugar.

【3】From the passage we can infer_______

A. sugar plays a very important role in Americans’ diet

B. kids eat more sugar than adults in America

C. the study on human beings lasted 58 weeks

D. the genetic structure of mice is totally different from that of people

【4】What’s the best title of the passage?

A. Living a sweet life B. Kids eat much more sugar

C. Genetic structure of humans D. Danger of too much sugar

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