题目内容：

Soon computers and other machines will be able to remember you by looking at your eyes！The program works because everyone's eyes are different. So in the future you won't have to remember a number when you want to use a machine or take money out of a bank. You’ll just have to look at the machine and it will be able to tell who you are.

The eye­recognition(眼睛识别)program has already been tested in shops and banks in the USA，Britain，Spain，Italy and Turkey. Soon this technology will take the place of all other ways of finding out who people are.

Eye­recognition is a course of recognizing iris(虹膜)，which includes the following steps. First，a kind of machine needs to collect different examples of one's iris from his eyes and store them. Second，when this person goes to the bank to take out money，this machine will have iris feature extraction(采集)．Then，this machine will compare the examples kept in it with iris feature extraction. Once the examples and the feature extraction are the same，this person will be identified，and he will take out the money from the bank successfully.

However，scientists are also working on other systems. Machines will soon be able to know you from the shape of your face or hand or even your smell！We already have machines that can tell who you are from your voice or the mark made by your finger.

Eye­recognition is better than other kinds because your eyes don't change as you get older，and don't get dirty like hands or fingers，and even twins have different eyes. So the eye­recognition program can be up to 94% correct，depending on how good the technology is. However，some other programs may only be 51% correct now. In Britain，it was found that 91% of people who had tried it said that they liked the idea of eye­recognition.

In the future your computer will be looking at you in the eye.So smile!

1.How does the eye­recognition program work?

A. You type in your number.    B. You say your name.

C. You look at the machine.    D. You show your ID card.

2.Which recognition program has been already in use?

A. Remembering smells.    B. Remembering fingerprints.

C. Remembering the shape of faces.    D. Remembering eyes.

3.Which of the following is TRUE according to the passage?

A. The eye­recognition program can be up to 51% correct.

B. In Britain，91% of people said that they liked the idea of eye­recognition.

C. Everyone's eyes are different，and even twins have different eyes.

D. The eye­recognition program is widely used now.

4.What's the passage mainly about?

A. You won't have to remember a number when you take money out of a bank.

B. We already have machines that can tell who you are from your voice.

C. Tell people how the eye­recognition program works and what advantages it has.

D. The eye­recognition program has already been tested in shops and banks.