题目内容：

    If you know a bottle of water has been recycled from urine (尿液), will you drink it? Chinese astronauts have done so.

China National Space Administration(CNSA)says it uses a high-tech machine to recycle wastewater. The machine will recycle everything from sweat, the water for washing hands, shower water, water used for brushing teeth, and even urine, to make drinking water.

It saves CNSA millions of YMB each year. At present, each CNSA astronaut uses about 4.4 liters of water every day. It costs about ￥150 million a year to transport water up to space.

The urine recycling system is needed for astronaut stations because it won’t have to ship up as much water to the station by space shuttles or rockets. Besides, it’s important as the space station is about to expand from three people living on board to more.

The recycling system was brought up to the space station last August by space shuttles. The three-man crew stood holding their drinks and congratulated engineers in CNSA center that worked on the system.

“This is something that has been the stuff of science work,” astronaut Chen Dong said before taking a small mouthful. “The taste is well worth trying.”

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

1.What can the water recycled from urine be used for?

A.Drinking.

B.Washing hands.

C.Brushing teeth.

D.Taking a bath.

2.Why is a high-tech machine to recycle wastewater needed on space stations?

A.To get astronauts to keep healthy.

B.To help astronauts do experiments.

C.To provide astronauts a basic living condition.

D.To save the cost of transporting water up to space.

3.Scientists get rid of bacteria in the wastewater by ________.

A.recycling

B.freezing

C.heating

D.collecting

4.What does the text mainly talk about?

A.Water recycled from urine tastes good.

B.How to recycle the wastewater on space.

C.New technology is used in the Chinese space station.

D.CNSA uses a high-tech machine to recycle wastewater for astronaut stations.