Questions 21 to 25 are based on the following passage.

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 do teenagers, university students, and men from all walks of life (各行各业).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. Smart but comfortable and convenient to wear, they have become one of American's newest ideas on fashion.
　　　
Although T-shirts are now available in a wide variety of bright materials and styles, the most popular kind is the traditional cotton T-shirts with a slogan or picture printed on the front. A T-shirt may bear a picture, a single word, a popular phrase, or an advertisement. As T-shirts are becoming more and more popular, new designs are coming up all the time.

21.Which of the following statements is true about T-shirts in the past?
[A] There were lots of multi-colored T-shirts.
[B] There were many kinds of T-shirts.
[C] They were worn by people from all walks of life.
[D] They were usually worn inside.

22.We can learn from the second paragraph that __________.
[A] T-shirts are worn by little children rather than by teenagers
[B] T-shirts are considered relatively expensive now
[C] T-shirts are considered fashionable in America
[D] T-shirts are worn on playground because they are comfortable

23.Which of the following statements is true according to the passage?
[A] T-shirts are cheap but uncomfortable.
[B] T-shirts are popular but difficult to care for.
[C] T-shirts are convenient and formal.
[D] T-shirts are smart and long wearing.

24.What is the most popular kind of T-shirts?
[A] The silk T-shirt in white color.
[B] The cotton T-shirt with a slogan or picture.
[C] The wool T-shirt worn at the beach.
[D] The nylon T-shirt worn for work.

25.What is being done to make T-shirts more attractive?
[A] A variety of new styles are being designed.
[B] The price is being lowered again and again.
[C] Advertisements are being widely used.
[D] The traditionally used material is being replaced.

Passage Two

Questions 26 to 30 are based on the following passage.

False teeth have been found in Italy in human heads that are over 2,500 years old. They were made of bone and set in gold. However, for hundreds of years afterwards, the apparent dental skill of those early people was lost. Without false teeth people looked old before their time, since so many lost their teeth at an early age.

Toward the end of the 17th century, rich people could buy false teeth made from ivory. The teeth were tied together with silk thread, but it was difficult to keep them in the mouth. That was why rich people would rather buy teeth from the poor who would often sell their teeth to buy food and clothing.