A、New technology is being employed. B、Advertisements are being widely used. C、New designs are being adopted. D、More synthetic ma

For many years, T-shirts were simple short-sleeved undershirts for men and boys. T-shirts used to be of one color—white. And since they were worn under shirts, they were generally not seen.
    Today the T-shirt has become fashionable. It can be seen everywhere and on everyone. Women and little children wear T-shirts as teenagers, university students, and men from all walks of life. T-shirts are worn on playground, at the beach or in town. They can also be worn for work. Yet T-shirts remain relatively inexpensive and long wearing, as well as easy to care for. [29] Smart but comfortable and convenient to wear, they have be come one of America’s newest ideas of fashion.
    Although T-shirts are now available in a wide variety of bright materials and styles, [30] the most popular kind is the traditional cotton T-shirts with a slogan or picture printed on the front. As T-shirts are becoming more and more popular, [31] new designs are coming up all the time.