Read the following article and select the best answer. Article: Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two kinds of animals come together in a partnership which does good to both of them. You may have noticed some birds sitting on the back of sheep. This is not because they want a ride, but because they find easy food in the parasites on sheep. The sheep allow the birds to do so because they remove the cause of discomfort. So although they can manage without each other, _ do better together. Sometimes an animal has a plant partner. The relationship develops until the two partners cannot do without each other. This is so in the corals of the sea. In their skins they have tiny plants which act as "dustman", taking some of the waste products from the coral and giving in return oxygen which the animal needs to breathe. If the plants are killed, or are even prevented from light so that they cannot live normally, the corals will die. Question: Some birds like to sit on a sheep because _ . - they can eat its parasites - they consider the sheep as their shelter - they enjoy traveling with the sheep - they find the position most comfortable
they can eat its parasites

(Question)
Read the following article and select the best answer. Article: English Language and Culture Program If you wish to improve your English-language skills as well as your understanding of the Canadian cultural context, the courses offered by ELC Evening are for you. Whether your goals are academic, business or immigration-related, there is a course to meet your needs. Evening course tuition:$490,0. All evening courses run for 10 weeks.A $50 discount is available to returning students or students attending two or more courses. ELC 550 Mondays, July 7 - September 22, 2008August 4 & September 11- HOLIDAY Mondays, October 6-December 15.2008 October 13-HOLIDAY This course is designed for non-native Englisli speakers who wish to take the 1ELTS (International English Language Testing System) exam.Each week, participants focus on specific modules of the test (speaking, reading, listening, and writing) to develop and improve the skills they need to succeed on the exam. ELC 552 Tuesdays, Aprils8-June 10,2008 Tuesdays, October 7 - December.16, 2008 November 11 - HOLIDAY This course is designed for participants who wish to improve their fluency and expressiveness in English.Production skills will be targeted, including pronunciation, intonation, rhythm, and stress.Participants are required to complete weekly in-class assignments , including speeches, monologues, interviews, and role-plays. ELC 554 Wednesdays, July 9 - September 10.2008 Wednesdays, October 8 -December 10.2008 This course is designed for non-native English-speaking university and college participants who wish to improve their academic leading and writing skills.This course gives participants the tools required for presenting information and building persuasive arguments in clear and cohesive written forms. ELC 555 Thursdays, July 10 - September 11, 2008 Thursdays, October 9 - December 11, 2008 This course is designed for non-native English speakers who are either working or planning to work in a business environment.Areas of focus include handling telephone conversations, networking, participating in meetings,... Question: One only needs to pay $440 if he _ . - attends 10 weeks' evening course - attends the evening courses for a second lime - finds others to take the evening course together - recommends another person to take one ot the evening courses
(Answer)
attends the evening courses for a second lime

Ques: Read the following article and select the best answer. Article: Most young people enjoy some form of physical activity. It may be walking, cycling, swimming or in winter, skating or skiing. It may be a game of some forms - football, basketball, hockey, golf of tennis. It may be mountaineering. Those who have a _ for climbing high and difficult mountains are often looked up with astonishment. Why are men and women willing to suffer cold and hardship, and to take risks in high mountains? This astonishment is caused, probably, by the difference between mountaineering and other forms of activity to which men give their leisure . Mountaineering is a sport and not a game. There are no man - made rules, as there are for such games as golf and football. There are, of course, rules of different kind which it would be dangerous to ignore, but it is this freedom from man - made rules that makes mountaineering attractive to any people. Those who climb mountains are free to use their own methods, but the sport requires high mental and physical qualities. A mountain climber continues to improve in skill year after year. A skier is probably past his best by the age of thirty, and most international tennis champions are in their early twenties. But it is not unusual for men of fifty or sixty to climb the highest mountains in the Alps. They may take more time than younger men, but they certainly experience equal enjoyment. Question: Mountaineering is a sport, not a game because _ . - it has man-made rules - it is too dangerous for climbers - it can't bring people joy and leisure - it is free for climbers to use their own methods.
Ans: it is free for climbers to use their own methods.

Question: Read the following article and select the best answer. Article: People in Shanghai can quench their thirst with high quality water if the Shanghai Water Authority (SWA) is able to make good on its word. It has vowed to make the city's water match its status as a world class city. "The current tap water quality meets national standards, but, compared with that of the European Union and the United States, it still needs to be improved." said the SWA's director general, Hang Jiayi. In other developed countries, water fountains can be found almost everywhere--people do not bother with bottled drinking water. By 2020, the water of the Huangpu River will be treated to reduce the amount of organic waste in it. Major water works that draw water from the Huangpu will need more treatment facilities to improve the colour, texture, ammonia and nitrogen content before 2010. These treatment facilities are expected to cost 4 billion yuan, something that could affect the price of water, according to Chen Yin, SWA's deputy director general. Chen said that replacing water pipes was also a key project. The city's aged pipes are mostly to blame for the bad water quality. The SWA has started the water facilities renovation work, including the more than 14,000 kilometres of indoor piping, 107,000 tanks on top of the buildings, and more than 6,000 underground facilities. World Water Day came on March 22, and this year's theme is "Water for the future". Beijing is also drawing up plans during China's Water Week, which runs until March 28. By 2010, the water for the Shanghai EXPO is to be above World Health Organization standards. And, the people of Beijing will be able to drink their tap water as well. Question: What is the main idea of the passage? - The cost of treating the tap water. - How to reach the water standards of developed countries. - The project for making tap water drinkable in Shanghai and Beijing. - The progress of treating the water of Huangpu River.
Answer:
The project for making tap water drinkable in Shanghai and Beijing.