题目内容：

Are you able to tell if people are lying? There is a piece of good news that a technology company is developing a lie detector app for smart phones that could be used by parents, teachers and Internet daters. The app measures blood flow in the face to assess whether or not you are telling the truth. Its developers say that it could be used for Internet daters wanting to see if somebody really is interested in them. Parents could use it on their children to see if they are lying, and teachers could work out which pupils are truthful.

The app is being developed by Toronto startup NuraLogix and the app is called Transdermal Optical Imaging. The idea is that different human feelings create different facial blood flow patterns that we have no control over. These patterns change if we are telling the truth or telling a lie. Using footage from the smart phone camera, the app will see the changes in skin colour and compare them to standardized results.

A study finds that anger is connected with more facial blood flow and redness while sadness is connected with less of both.

Kang Lee, who has been researching the field for 20 years, said that the lie detector test will let you find out the truth remotely and secretly. He said: “It could be very useful, for example, for teachers. A lot of our students have math anxiety, but they do not want to tell us because that’s embarrassing.”

Lee added that the technology would not replace lie detectors used in a court of law. He said: "They want the accuracy to be extremely high, like genetic tests---a one-in-a-million error rate. Our technique won't be able to achieve an extremely high accuracy level, so because of that, I don't think it's useful for the courts. He added that it will be a few years before the dating app is available to consumers.

1.What is the first paragraph mainly about?

A. The operation process of the app.

B. The history of a technology company.

C. The functions and applications of the app.

D. The origin and development of the new technology.

2.What do we know about the app?

A. Its accuracy is the same as genetic tests.

B. It can help teachers pick out the honest pupils.

C. It will help see the structures of human skin.

D. It has been already on the market for a few years.

3.What can we learn from the text?

A. The technology will be applied to the medical field.

B. The technology will replace lie detectors in the court of law.

C. Different human feelings have nothing to do with facial blood flow patterns.

D. Sadness is related to less facial blood flow and redness when compared with anger.

4.What is the best title for the text?

A. The Story about Kang Lee.    B. The Disadvantages of New Technology.

C. Various Smart Phones.    D. A Developing App for Smart Phones.