on the upper part of your body. But the box itself is quite bulky, hard to hide beneath clothing and involves a dozen or more wires being attached to the patient's chest.

　　The Cardioskin T-shirt, which is made from cotton, could be a much more convenient alternative and can be worn 24 hours a day - meaning it is more likely to pick up any abnormal rhythms in the patient's heart. It has 15 tiny electrodes woven into the material which are strategically placed around the chest area to track the electrical signals from the heart as they travel across the main part of your body.

　　The electrodes are powered by a battery which can be removed easily when you need to wash the Tshirt and feed results to a microchip which then sends them out wirelessly to an app. This converts(转换) the data into an easy-to-read chart showing if the heart rate is abnormal. The results are shared with the patient's doctor so they can check the patient's heart without having to call them into the hospital.

　　Martin Cowie, a professor of cardiology at Imperial College London, said, "Cardioskin could be an important development for cardiologists."

3. How many British people are having dangerous heart conditions according to the text?

　A. Less than 0.5 million. B. Less than 1 million.

　C. At least 1.5 million. D. At least 2 million.

4. What is the main idea of Paragraph 3?

A. The difficulty in detecting atrial fibrillation.

B. The benefit of detecting atrial fibrillation.

C. The process of detecting atrial fibrillation. D. The future of detecting atrial fibrillation.

5. Why did the author mention a Holter monitor in the text?

　A. To show how convenient the Cardioskin T-shirt is.

　B. To introduce a way to check the patient's heart.

　C. To encourage people to care about their health .

　D. To explain why doctors like using the device.

6. What can we learn about the Cardioskin T-shirt?

A. It has a battery that can be charged easily and quickly.