Problem:OPTIONS:
- doctors must never decide whether to save babies or cancer patients
- doctors are able to save premature babies, but the cost is very high
- having a premature baby was cheaper and safer 20 years ago
- Christie survived because the hospital paid her bills

Read the following article and answer the question. Article: When Christie Andrews was born, she weighed less that half of one kilogram. Her heart was the size of a large coin. Her mother said Christie was so small that she could hold her in the palm of one hand. Christie couldn't breathe without a machine to give her oxygen. If she had been born 20 years earlier, she would probably have died at once. She needed two operations, but she survived without serious damage. Twenty years ago , 90% of all premature babies died. Today, doctors manage to save four out of every five, because they have better machines for breathing and better ways to feed the babies. But saving Christie's life cost more than $ 400,000. In some cases, doctors spend 1 million dollars saving a single child. The parents usually don't have enough money to pay. The government, an insurance company or the hospital picks up the bill. Even after a baby goes home from the hospital, it may require medical care. Some people think it makes more sense to spend money saving 10 adults who have cancer or other diseases than saving one small baby. But nobody wants to be the doctor who has to tell parents to their faces, "Sorry, I won't save your new child." Question: The main idea of the article is _ . Answer:
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A: doctors are able to save premature babies, but the cost is very high

Problem:OPTIONS:
- a kind of computer chips
- a small computer
- bigger than a textbook
- much heavier than a usual schoolbag

Read the following article and answer the question. Article: Is your schoolbag too heavy to carry? The e-schoolbag will help you. In fact, the e-schoolbag should perhaps be called an e-textbook. It is a small computer for students. Heavy schoolbags have been a serious problem for them for a long time. But the e-schoolbag will change everything. It is much lighter than a usual schoolbag. Also, it is as small as a usual textbook, an exercise book and so on. They can be made into _ that are as small as a stamp. The students can read the text page by page on the "screen", take notes, or even send e-mails to their teachers. All they have to do is to put the right chip into the e-schoolbag and press the button. It is said that e-schoolbags have been put into use in some Chinese middle schools. In 2012, some students in Shanghai started to use e-schoolbags in the new term. Some say that e-textbooks can be easily broken. Some say it is not good to students' eyes. But only time will tell us all. Question: An e-schoolbag is _ . Answer:
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A: a small computer

Problem:OPTIONS:
- For more than eight years.
- For more than five years.
- For three to five years.
- For less than three years.

Read the following article and answer the question. Article: There are millions of people throughout the world who are either born blind or have become blind over the course of their lifetimes. It is unfair to take away the visual beauty of the world from these people. Doctor Humayun has created the world's first bionic eye that could change the life of every blind people in the world. Doctor Mark Humayun is a well respected professor at the Doheny Eye Institute in California. He has been working for years on creating a bionic eye that would allow blind people to see images just like a normal person does. His idea of the bionic eye is actually an eye that has been built in a small video camera. The test results show the bionic eye has given blind patients the amazing ability to see the scientists doing the tests. But the images are still blurry and we need much work before the eye actually becomes a regular implant into blind people. Humayun believes that he can go into production with the bionic eye over the next three to five years. A closer look at the bionic eye is amazing. The patient wears a special set of eyeglasses. All the signals are passed to the implanted eye. It's done by wireless technology. Humayun has created an invention that could change the lives of millions of people. Imagine a world in which someone would no longer fear about being blind. This could be considered a technological achievement. Question: How long will it take Doctor Humayun to produce his bionic eye? Answer:
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A: For three to five years.

Problem:OPTIONS:
- by bus
- by bike
- on foot
- A and C

Read the following article and answer the question. Article: Kate is an English girl. She lives in a tall building in the city of London. There are sixteen floors in the building, and she lives on the tenth floor. She uses a lift to go up and down. Kate studies in a middle school near her house and she works hard. She goes to school early. Every day she leaves her home at half past six. She walks to the lift, and it takes her down to the first floor. There is a bus stop near the building. Usually she takes No.7 bus to her school, but sometimes she goes on foot. It is only four kilometers to her school from the building. She gets to school at about seven twenty. Classes begin at eight. She goes to play games at three forty. She gets home at a quarter past five. She begins to do her homework at eight and finishes it at half past nine. Question: She goes to school _ . Answer:
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A:
A and C