Read the following article and select the best answer. Article: Leaders of the World Health Organization say they are concerned about the air quality and health efiects on citizens during a recent outbreak of heavy pollution in Beijing.Still,they said they were unsure of the exact amount the air pollution takes on any person's body,casting doubts on local reports tying the area's dirty air to particular cases of illness. Speaking at a briefing on Tuesday,the WHO's Western Pacific regional director, Shin Young--Soo,cited reports about poor air quality causing lung cancer in recent weeks. "The WHO is skeptical of the information,"she said."We're cautious of whether the illness is related to air po11ution. We know it has an impact on health,but we don't know how much." The officials didn't cite particular reports.The comments follow a number of articles since late last year connecting some cases of diseases like lung cancer with pollution,.including one in November regarding an 8-year-old girl. The health impact of Beijing's gray skies has been on the minds of many over the past week. Local authorities on Tuesday preserved an orange alert the city's second highest pollution-warning level--and again warned people to stay indoors.Experts widely agree that small particulates known as PM2.5 carry significant short-and long-term health risks,particularly with children.Other studies find a certain link between pollution and shorter life spans. Chinese state media have noted a rise in cancer levels in Beijing,without specifying whether the new cases are the main result of pollution,smoking,other sources or some combination. Bernhard Schwartlander,the organization's China chief,said he is concerned and has been in contact with national authorities."There is no easy solution,"Dr. Schwartlainder said,adding that solving the problem requires managing industry and the economy.WHO leaders advised citizens.to stay indoors and limit exposure to the harmful particulates.When asked if wearing a face mask has any proven efficacy in preventing health effects of air pollution,Dr.... Question: What would be the best title of this passage? - The dangers of heavy pollution - The impacts of pollution on health - The importance of protecting the environment - The uncertainty of relationship between pollution and health
The uncertainty of relationship between pollution and health

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Read the following article and select the best answer. Article: You may not know a lot of people when you start high school. Even if you know some new students, you still feel nervous that you don't know any upperclassmen and teachers. How are you going to make friends among this sea of unknown faces? Most high schools welcome new students before school actually starts. These are helpful not only because you learn your way around the buildings and get to meet some of your teachers, but also because you get to meet new students. That way, when you show up on your first day of school, you may already recognize a few familiar faces. When you talk to people, you'll probably find that a lot of them are feeling just like you. They're all new to the school and don't know what to expect. Talking about a common concern with your classmates can help you develop friendships. The work in high school is something freshmen are probably worried about. The work in high school builds on what you learned in middle school, giving you a more advanced knowledge of many subjects. So you may find you have more work to do or that it's a bit more challenging . If you ever find your work too difficult, teachers can give you extra help. High school also has more activities after class than middle school, such as clubs, music and theater groups and sports teams. This is a good time to explore your interests and try new things. Middle school taught you the basics of academics, time management, and social skills while providing you with a little extra support and guidance. High school gives you the chance to learn how to be more independent and responsible . Question: What are new students probably worried about? - The learning tasks. - The difficulty in communication. - The way they deal with teachers. - The training in time management.
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The learning tasks.

Ques: Read the following article and select the best answer. Article: Before the mid 1860's, the impact of the railroads in the United States was limited, in the sense that the tracks ended at this Missouri River, approximately the center of the country. At the point thetrains turned their freight, mail, and passengers over to steamboats, wagons, and stagecoaches. This meant that wagon freighting, stage coaching, and steam boating did not come to an end when the first train appeared; rather they became supplements or feeders. Each new "end of track" became a center for animal drawn or waterborne transportation. The major effect of the railroad was to shorten the distance that had to be covered by the older, slower, and more costly means. Wagon freighters continued operating throughout the 1870's and 1880's and into the 1890's. Although over constantly shrinking routes, and coaches and wagons continued to crisscross the West wherever the rails had not yet been laid. The beginning of a major change was foreshadowed in the later 1860's, when the Union Pacific Railroad at last began to build westward from the Central Plains city of Omaha to meet the Central Pacific Railroad advancing eastward from California through the formidable barrier of the Sierra Nevada. Although President Abraham Lincoln signed the original Pacific Railroad bill in 1862 and a revised, financially much more generous version in 1864, little construction was completed until 1865 on the Central Pacific and 1866 on the Union Pacific. The primary reason was skepticism that a Railroad built through so challenging and thinly settled a stretch of desert, mountain, and semiarid plain could pay a profit. In the words of an economist, this was a case of "premature enterprise", where not only the cost of construction but also the very high risk deterred private investment. In discussing the Pacific Railroad bill, the chair of the congressional committee bluntly stated that without government subsidy no one would undertake so unpromising a venture; yet it was a national necessity to link East and West together. Question: What can be inferred about coaches and wagon freighters as the railroad expanded? - They developed competing routes. - Their drivers refused to work for the railroads. - They began to specialize in private investment. - There were insufficient numbers of trained people to operate them.
Ans: There were insufficient numbers of trained people to operate them.

Ques:Read the following article and select the best answer. Article: There was once a lonely girl who longed so much for love. One day while she was walking in the woods she found two starving songbirds. She took them home and put them in a small cage, caring them with love. Luckily, the birds grew strong little by little. Every morning they greeted her with a wonderful song. The girl felt great love for the birds. One day the girl left the door to the cage open accidentally. The larger and stronger of the two birds flew from the cage. The girl was so frightened that he would fly away. So as he flew close, she grasped him wildly. Her heart felt glad at her success in capturing him. Suddenly, she felt the bird go weak, so she opened her hand and stared in horror at the dead bird. It was her desperate love that had killed him. She noticed the other bird moving back and forth on the edge of the cage. She could feel his strong desire--needing to fly into the clear, blue sky. Unwillingly, she lifted him from the cage and threw him softly into the air. The lucky bird circled once, twice, three times. The girl watched delightedly at the bird. Her heart was no longer concerned with her loss. What she wanted to see was that the bird could fly happily. Suddenly the bird flew closer and landed softly on her shoulder. It sang the sweetest tune that she had ever heard. Remember, the fastest way to lose love is to hold on it too tight; the best way to keep love is to give it wings! Question: What can we learn from the passage? - Catch what you can catch on your way to success. - Going too far is as bad as not going far enough. - East or west, home is best. - A bird in the hand is worth two in the bush.

Ans:
Going too far is as bad as not going far enough.