Riding School: You can start horse--riding at any age.Choose private or group lessons any weekday between  9 a.m.and 8:30 P.m.(3:30 p.m.on Saturdays).There are 10 kilometers of tracks and paths for leisurely rides across farmland and open country.You will need a riding hat. Opening Hours:Monday through Friday:9:00 a.m.--8:30 p.m. Phone:(412)396--6754  Fax :(412)396--6752 Sailing Club: Our Young Sailor's Course leads to the Stage 1 Sailing qualification .You'll learn how to sail safely and the course also covers sailing theory and first aid.Have fun with other course members , afterwards in the clubroom.There are 10 weekly two-hour 1essons (Tuesdays 6 p.m.~8 p.m.). Opening Hours:Tuesdays:6:00 p.m.--8:00 p.m.  Phone:(412)396--6644 Fax:(412)396--6644 Diving Centre: Our experienced instructors offer one-month courses in deep-sea diving  for beginners.There are two evening lessons a week,in which you learn to breathe underwater and use the equipment safely.You only need swimming costume and towel.Reduced rates for couples. Opening Hours:Monday and Friday:6:30 p.m.--8:30 p.m. Phone:(412)396--6312  Fax:(412)396--6706 Medical Center: The staff  of the Medical Center aim to provide convenient and comprehensive medical care to students and staff of the university.The center is well equipped and the staff here are trained to deal with a broad range of medical problems.Both female and male doctors as well as nursing staff are available for consultation .Also,all kinds of medicines are sold here and are cheaper for students than other drugstores. Opening Hours:24 hours from Monday to Sunday Phone:(412)396--6649  Fax:(412)396--6648 Water sports Club: We use a two-kilometer length of river for speedboat racing,and water-skiing,A beginners' course consists of ten 20-minute lessons.You will learn to handle boats safely and confidently,but must be able to swim.The club is in a convenient central position and is open daily from 9 a.m to 4 p.m,with lessons all through the day. Opening Hours:Monday through Friday:9:00 a.m.--4:00 p.m. .If you want to experience a new activity in the countryside in the mornings,you may fax   _   . A) (412)396--6752 B) (412)396--6648 C) (412)396--6876 D) (412)396--6706
A
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Before we send humans into deep space, we'll have to find out just how long the human body can survive in a weightless environment. One problem is that in space there's no physical sensation to let you know when you're upside down and astronauts have to rely on possible clues from their surroundings. A few hours after reaching orbit , one in three of all astronauts will experience space sickness--a feeling rather like carsickness. There is also the problem of protection from the extreme hazards  of space such as constant meteorite bombardment  and radiation. It is going to take some clever technology to keep rockets and astronauts from these dangers. Even with a well-protected spaceship, space travel isn't going to be easy. No matter what you travel in, it is going to be a long flight in space! Science fiction writers often imagine using suspended animation , a kind of forced long-term sleep, as a way for astronauts to escape the boredom of long missions. An even stronger measure might be to freeze the astronauts. We already use cryogenic  techniques to preserve dead bodies and store human embryos . Freezing living adults may not be so far away, but perhaps we don't have to do that. Perhaps we should use our existing technology and send frozen embryos to the far corners of universe. Hundreds of years from now, billions and billions of miles away, the embryos will be thawed  and their hearts will start beating. These astronauts of the future will not grow inside a mother's body but will be produced in a machine. They will be brought up by robot. It may seem strange but one day it might just happen. The passage is mainly about   _  . A) the bright future of space flight B) the possibility to train embryo astronauts C) the physical and mental conditions of astronauts D) the problems and the possible solutions to them in long space flights
D
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Bill and his family has been living in the six-family building for years. All the neighbors got along fairly well with each other until recently. An old man and his wife used to live on the second floor. Bill's mother and the old lady were good friends. Unfortunately the lady died last month. Her husband could not live alone, so he had his grandson move over and live with him. The grandson has become a problem to all the neighbors, especially to Bill's family. The walls of the building are thin and he is noisy. Bill is used to peace and quiet but the young man likes to listen to the radio late at night. Sometimes friends of his visit and they make a lot of noise. That is too much for Bill's family. Bill's mother once asked the old man politely if he was able to sleep well at night, but obviously the man didn't understand what she meant. If he did and spoke to his grandson, the young man obviously didn't listen, since things haven't changed any. Everyone in Bill's family agrees that something must be done though they don't want to hurt the kind old man. The grandson makes a lot of noise as   _  . A) he never thinks other people might not be happy with so much noise around B) the walls of the building are thin C) he likes to listen to the radio at night D) friends of his visit

A
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