题目内容：

    A UK supermarket has become the first in the world to let shoppers pay using just the veins (纹理)in their fingertips. Customers at the Costcutter Store, at Brunel University in London, can now pay using their unique vein pattern to identify themselves.

The firm behind the technology, Sthaler, has said it is in "serious talks" with other major UK supermarkets to adopt hi-tech finger vein scanners at pay points across thousands of stores. It works by using infrared(红外线)to scan people's finger veins and then links this unique biometric map to their bank cards. Customers' bank details are then stored with payment provider Worldpay and in the same way you can store your card details when shopping online. Shoppers can then turn up to the supermarket with nothing on them but their own hands and use them to make payments in just three seconds.

Previous studies have found fingerprint recognition, used widely on mobile phones, is likely to be hacked and can be copied even from fingerprint left on phone screens. But Sthaler claims vein technology is the most secure biometric identification method as it cannot be copied or stolen. The technology uses an infrared light to create a detailed map of the vein pattern in your finger. It requires the person to be alive, meaning in the unlikely event a criminal hacks(非法侵入)off someone's finger, it would not work.

Sthaler said it takes just one minute to sign up to the system firstly and, after that, it takes just seconds to place your finger in a scanner each time you reach the supermarket checkout. Simon Binns, commercial director of Sthaler, told the Daily Telegraph, ''This makes payments so much easier for customers. There are no known occurrences where this security has been broken. ''

1.Which supermarket in the world can now use the vein-recognition technology?

A.Grocery stores in London.

B.Thousands of stores in the UK.

C.University supermarkets in the UK.

D.Costcutter Store at Brunel University in London.

2.What message does Sthaler intend to convey according to Paragraph 3?

A.The system is safe. B.Hacker attacks are unlikely.

C.Vein patterns can be copied. D.The technology is convenient.

3.What should customers do before using the system?

A.Copy the fingerprint. B.Protect against hacking.

C.Contact the supermarket. D.Register on the system.

4.What do we know about the vein-recognition system?

A.It has been hacked.

B.It will be adopted by more shops.

C.Its company is optimistic about it.

D.Its technology needs further improvement.