user: Problem: OPTIONS:
- before she got her PhD in astrophysics
- before she went to Standford University
- after she wrote books on space
- after she travelled into space
Q: Read the following article and answer the question. Article: Sally Ride was born in California in 1951. She was the first American woman to travel into space. She loved to play tennis and wanted to be a tennis player when she was young. But after three months' professional  training, she changed her mind. She went to Stanford University and started to study science. She studied stars and planets. She did researches at the university and got her PhD in astrophysics  after several years' hard work. In 1977, she took a test to become an astronaut. And then she was picked up from over 8,000 people. In order to realise her dream of going into space, she had to get different kinds of special and difficult training. She learned how to fly a plane, how to jump out of a plane as well as how to operate special machines Sally and four other astronauts flew a spaceship called Challenger on Jun. 18, 1983. She became the first American woman to travel into space. Later, she taught at the University of California. Then she wrote seven books on space for children, encouraging children to study science. Unfortunately, she died in 2012. Question: Sally Ride taught at the University of California   _  . Answer:
Answer: after she travelled into space

Problem:OPTIONS:
- 21
- 23
- 27
- 25

Read the following article and answer the question. Article: Stephen Hawking was one of the most famous scientists in this century. He was born in 1942. He's a world well-known on space and time. Stephen is researching some very big questions, such as: How did the universe begin? How will it end? Stephen was a student at Oxford University. He studied math and science. Then, at the age of twenty, he became sick. He was so young, but the doctors said to his family, "He has only two more years to live." As a matter of fact, the doctors were wrong---- he didn't die. He can't  walk now but he uses a wheelchair . He can't feed himself and get in or out of bed himself. But he refused to give in to the condition. He talks with the help of a computer. After Oxford, Stephen went to Cambridge University. Three years later, in 1965, he became a doctor of philosophy . Because of his serious health problems, it was difficult for him to draw diagrams  or to write. So he started to think in pictures. With this new way of thinking, he became one of the most famous scientists in the world. In 1991, he met the Pope  in Rome. They talked about his ideas. Then in 1998, he wrote his first important book, A Brief History of Time. It sold more than 5.5 million copies in 33 different languages. He was once invited to China, he impressed us with his self-confidence, humorous and witty  conversation. Question: How old was Stephen when he became a doctor of philosophy? Answer:
****
A: 23

Read the following article and answer the question. Article: There are some very good inventions which, for one reason or another, don't become popular. These inventions should be better known, even though I think that some of them are crazy. Let's have a look at some of these inventions and see if you agree that they should be more successful. The Australians had a great idea to stop people from drinking and driving. The idea was that if a driver wanted to start the car, she or he would have to blow into a bag first. If there was too much alcohol   in their breath, the car wouldn't start. It sounded like a great idea to me, but people said that they might need to drive the car in an emergency   even if they had drunk too much alcohol. Another idea I liked was an invention by a scientist who thought his children watched too much TV. He connected the TV to an exercise bike so that the electricity to power the TV was produced by the bike. If the children wanted to watch a lot of TV, they had to pedal   very hard. I found another invention on the Internet which encouraged good habits. Believe it or not, this invention was an ashtray   which spoke to you when you lit a cigarette! The "voice" of the ashtray was started by the heat from the cigarette and reminded you how dangerous it is to smoke. One of the strangest inventions I have come across is a bicycle which can cross rivers! The idea was that when you came to a river, you could _ a huge plastic ball all around the bike. You would then get into the ball which would float on the river while you pedaled the bike inside the ball! Why not use a bridge instead? A friend of mine at school once bought a strange pair of football shoes. On the bottom of the shoes there was a rotating pad of studs  . The idea was that you would change direction more quickly if the studs rotated with you. The problem was that every time you stopped you changed direction whether you wanted to or not! I think he wore those shoes twice! One thing I would like is a baseball cap with a built-in radio so you can listen to sport all day with your hands... Question: What's the best title for the passage? Answer:
OPTIONS:
- Popular Inventions Today
- Technology and Invention
- Inventions with a Difference
- The History of Invention
Inventions with a Difference

input: OPTIONS:
- People must build more power plants.
- More sources of water must be found.
- Every country should offer some money to Africa.
- All the people living in the area should move to another place. Now, answer this question: Read the following article and answer the question. Article: Lake Victoria is the largest lake in AfricA. It is also the second largest lake in the world. It is an important lake because it is one of the sources  for the longest river in the world, the Nile River.Lake Victoria provides a source of water, food, and power for several African countries.Lake Victoria is a big part of African life. Unfortunately, Lake Victoria has a problem. _ .There are several power stations at Lake Victoria in Uganda. These are on the Nile River, and besides producing power, they keep the water of the lake at a certain level.For the past forty years, that level has been 11.9 meters.Over the last several years, the water level has dropped by about 2.5 meters.There seem to be several reasons for this drop. One possible reason is drought .Drought has been very bad in the area since 2000.Lake Victoria gets all of its water from rain, so the drought means less water in the lake. However, some environmentalists believe that the real problem is the power plants(factories) on Lake Victoria. Uganda depends on those power plants for most of its power, and they made the power plants larger in 2000.Many people believe the power plants have been taking too much water off Lake Victoria. As a result, they have been asked to use less water until Lake Victoria goes back to its old level. Whether the low water level is caused by drought or power plants, the result is the same.This is already a poor area of Africa, where many people live a really hard life.People, animals and plants around Lake Victoria will suffer even more from low water levels on the lake.Many people need Lake Victoria for fishing or growing food. Fish need the water to live, and animals need it for water.Plants around the lake will die without the water, and then more animals and people will suffer.Unless the lake fills soon, many people will suffer and die. Question: According to the passage, how can we solve the problems around Lake Victoria? Answer:
A:
output:

assistant: More sources of water must be found.