Tea bag drinking is most Westerns’ favorite way of drinking tea. Do you know how it came about?

The tea bag was invented in 1908 by Thomas Sullivan, an American tea seller. He was sending out free tea in silk (丝绸) bags for people to try. People put the bags together with the tea leaves into the cup and added hot water. The tea tasted good, and people thought it was easy to clean the cup. They were not happy when Sullivan started sending them loose (散的) tea again.

Sullivan realized that he had a hot new thing in his hands, and he built a machine to pack the bags. As tea bags became popular, they were changed from silk to gauze (薄纱) and later paper. In 1952, Lipton Tea made the tea bag even more popular with its invention of the four-sided tea bag. Tea bags were soon a hit in the UK, and today 85% of the tea in the UK is packed in paper bags.

However, many people still prefer loose-leaf tea. This is because some tea companies put not very good tea in their tea bags. But for most drinkers, tea bags are still the easy, tasty way to go.

1. Who invented the tea bag?

   A. An English tea seller.           B. Chinese.            C. Lipton.     D. Thomas Sullivan.

2. The tea in silk bags was welcome because ________.

   A. the tea in bags was free and very good

   B. the tea tasted good and the cup was easy to wash

   C. people were happy with the loose tea

   D. people didn’t know any better way to enjoy the tea

3. The material of the tea bags is usually __________ now.

   A. silk                          B. gauze                C. paper      D. plastic

4. The underlined sentence “Tea bags were soon a hit in the UK” probably means “__ in the UK”.

   A. Tea bags soon became popular

   B. Tea bags surprised everyone very much

   C. Tea bags kicked (踢) the loose-leaf tea out of the market 

   D. Tea bags weren’t allowed to be sold

5. The reading mainly talks about ___________.

   A. the invention of tea                B. the way of drinking tea

   C. the history of tea bags                D. people’s favorite tea in the world

   If you knew a bottle of water had been recycled from urine (尿), would you drink it? Astronauts at the International Space Station (ISS) may soon do so.

   NASA (美国航空航天局) said it would use a high-tech machine (高科技机器) to recycle wastewater at the ISS. The machine will recycle everything from sweat (汗), the water for washing hands, shower water, water used for brushing teeth, and even urine, to make drinking water.

   It will save NASA millions of dollars each year. At present, each ISS astronaut uses about 4.4 liters (升) of water every day. It costs about $24 million a year to transport water up to ISS. NASA says that a liter of water costs about $11,000.

   The machine will be sent to the ISS in October 2008. NASA hopes it will recycle about 93% of all water used on the station.

   Will the water be clean? Scientists say the wastewater will go through a very complicated process (复杂的过程). For example, different chemicals will be put in the wastewater; the water will be heated to 130℃ to get rid of bacteria (细菌). The recycled water is thousands of times better than the water from a city tap, scientists say.

1. NASA will use a high-tech machine to recycle wastewater at the ISS to __________.

   A. protect the ISS

   B. make astronauts at ISS work harder

   C. provide better water and food for ISS astronauts

   D. save the cost of transporting water up to the ISS

2. At present it costs NASA about _________ dollars to transport water up to an astronaut at the ISS a day.

   A. 4.4 thousand              B. 11 thousand     C. 48.4 thousand        D. 24 million

3. Scientists plan to get rid of bacteria in the wastewater by ___________.

   A. freezing           B. heating         C. shaking             D. precipitating (沉淀)

4. The reading mainly tells us something about ___________.

   A. water recycling                          B. the International Space Station

   C. a high-tech machine                  D. the cost of NASA

5. Which of the following sentences is true, according to the passage?

   A. The recycled water is much better than that from a city tap.

   B. The high-tech machine will recycle all the water used on the station.

   C. At present, each ISS astronaut uses more water than the people living on the earth.

   D. The high-tech machine can only recycle urine to make water at present.

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