题目内容

The girl ______ is reading under the tree _____my sister.

A. which; is B. whom; was

C. who; is D. who; was

C

【解析】

试题分析:考查定语从句辨析。考查定语从句的引导词,因其先行词是the girl在从句中做主语,故用引导词who。主句谓语的时态从前面的定语从句可以判断这里应该用一般现在时。句意:坐在树下读书的女孩是我的姐姐。故选C。

考点:考查定语从句辨析。

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Mosquitoes(蚊子) ruin countless American picnics every year, but around the world, this bloodsucking beast isn’t just annoying--it causes a health problem. More than a million people die from the spread of mosquito-borne diseases like malaria and yellow fever each year. Attempts to control populations via insecticides like DDT have had ruinous side effects for nature and human health. Neurobiologist Leslie B. Vosshall has a different solution for stopping the insects and the spread of disease. “I believe the key to controlling mosquito behavior is to understand better how they sense us,” she says.

At their Rockefeller University lab, Vosshall and her colleagues are studying the chemical sensory processes by which mosquitoes choose hosts. How do they sense heat, humidity, carbon dioxide, and body odor(气味)? What makes some people more attractive to a mosquito than others? It takes blood and sweat to find out. To study how mosquitoes assess body odor, Vosshall and her teammates might wear stockings on their arms and keep from showering for 24 hours to create sample smells, Then comes the hard part. They insert their arms into the insects’ hidden home to study how mosquitoes land, bite, and feed and then they document how this changes. This can mean getting anywhere from one bite to 400, depending on the experiment. Studying male mosquitoes is more pleasant. Since they don’t feed on blood, the lab tests their sense of smell using honey.

Vosshall and her team have also begun to study how genetics contribute to mosquitoes’ choice of a host. She’s even created a breed that is unable to sense carbon dioxide, an important trigger for the insects. “By using genetics to make mutant(变异的) mosquitoes, we can document exactly how and why mosquitoes hunt humans,” Vosshall says.

Once Vosshall figures out what makes mosquitoes flock to us, she can get to work on making them leave us alone. Many of her lab’s proposed solutions sound simple enough, including bracelets(手镯) that carry long-lasting repellants(驱虫剂) or traps that can reduce populations, but the breakthroughs, when they come, may save millions of lives in the developing world—and a lot of itching everywhere else.

1.Vosshall and her colleagues are mainly studying mosquitoes’ ______.

A. appearance B. size

C. behavior D. change

2.By saying the underlined part “Then comes the hard part”, the author probably means that______.

A. the insects smell terrible

B. the experiment will last long

C. The researchers will probably suffer

D. the researchers have to study lots of documents.

3.Why is it less challenging to study male mosquitoes?

A. They are not bloodsuckers.

B. They are afraid of stockings.

C. They have a poor sense of smell.

D. They are protective of their hosts.

4.It can be inferred from the last paragraph that Vosshall’s research______.

A. looks very promising

B. has saved millions of lives

C. is facing great difficulties

D. is quite simple to carry out.

Earthquakes are something that people fear.There are some places that have few or no earthquakes.Most places in the world,however,have them regularly(有规律的).Countries that have a lot of earthquakes are usually quite mountainous(多山的). The most talked about earthquake in the United States was in San Francisco in 1906. Over 700 people died in it.The strongest one in North America was in 1964. It happened in Alaska.

Strong earthquakes are not always the ones that kill the most people.In 1755,one of the strongest earthquakes ever recorded was felt in Portugal.Around 2,000 people died.

In 1923,a very strong earthquake hit the Tokyo,Yokohama area of Japan.A hundred and forty thousand people died.Most of them died in fires which followed the earthquake.

One of the worst earthquakes ever was in China in 1976.It killed a large number of people.The worst earthquake ever reported was also in China,in which 400,000 people were killed or injured.This earthquake happened in 1556.

Earthquakes worry people a lot.The reason is that we often do not know when they are coming.People can not prepare for it.

1.Earthquakes happen .

A.in all the places in the world

B.only in the countries that have a lot of mountains

C.regularly in most places in the world

D.only in a few places along the coast

2.When and where was the worst earthquake ever reported?

A. 1964; Alaska. B. 1556; China.

C. 1923; Japan. D. 1976; China.

3.According to the passage, which of the following is NOT true?

A.The stronger the earthquake is, the more people are killed.

B.Earthquakes often come unexpectedly (出乎意料地).

C.Earthquakes can cause fires.

D.People still don’t know how to tell when an earthquake will come.

4.What may be talked about in the sixth paragraph?

A.How do earthquakes worry people?

B.What will people do to prepare for earthquakes?

C.How can we save people when earthquakes happen?

D.How do earthquakes happen?

John and Bobby joined the same company together just after graduation from college the same year. Both worked very hard. After several years, however, the boss promoted (提拔) Bobby to the position of manager but John remained an ordinary worker. John couldn’t take it anymore, gave his resignation (辞呈) to the boss and complained that the boss only promoted those who only said good words to him.

The boss knew John worked very hard for the years. He thought for a moment and said, “I hope you will do one more thing for our company before you leave.”

John agreed. The boss asked him to go and find anyone selling watermelons in the market. John went and returned soon. He said he had found a man selling water melons. The boss asked how much they per kilo. John shook his head and went back to the seller to ask and returned to tell the boss $1.2 per kilo.

The boss told John to wait a second, and he called Bobby to come to his office. He asked Bobby to go and find anyone selling watermelons in the market. Bobby went, returned and said, "Boss, only one person is selling watermelons. $1.2 per kg, and $10 for 10 kg. He has 340 melons in all, 58 of which are on the table. Every melon weighs about 2 kg. Brought from the South two days ago, they are fresh and red. "

John was impressed and realized the difference between himself and Bobby. He decided not to resign but to learn from Bobby.

1.According to Paragraph 1, John thought that ____________.

A. Bobby wasn’t fit to be a manager.

B. Bobby was lazy though he was clever.

C. the boss was expecting to hear good words.

D. it was unfair that the boss only promoted Bobby.

2.The underlined word ?take? in Paragraph 1 means ?_________?.

A. accept B. understand

C. forget D. judge

3.Why did the boss tell John and Bobby to find anyone selling watermelon in the market?

A. To show watermelons are in great need.

B. To test their abilities to make market research.

C. To make John realize Bobby?s ability to do business.

D. To help John learn the difference between Bobby and him.

4.What does the passage mostly want to tell us?

A. Learning is the key to great success.

B. A person fails usually because of carelessness.

C. A more successful person sees more and further.

D. One’s success is not related to his working hard.

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