阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳答案。
A
Recently, a great scientific discovery amazed the world. Chinese scientists have already found a new method to produce water on the moon, which could change how we think about living on the moon in the future. They wrote about their discovery in a science magazine called The Innovation. Their discovery shows that by using lunar soil (月壤), scientists can create a lot of water on the moon.
In the past, missions to the moon showed that there might be ice at the moon's north and south poles(极). However, there isn't much water in lunar soil—only a little bit, like 0.0001 per cent to 0.02 per cent, which makes it hard to find and use water there. So it's difficult for people to expect to live on the moon.
The researchers, however, found something exciting, after studying the rocks and soil brought back by the Chang'e-5 spacecraft from the moon. One of the exciting things they discovered is that lunar soil melts when it reaches over 1,000℃. When it begins to melt, it produces water vapour(蒸气). They learnt that just 100g of lunar soil can give us 5.1g to 7.6g of water. So, if we had one ton of lunar soil, we could get between 51kg and 76kg of water. That's enough to give drinking water to 50 people for one day.
All in all, this research opens up new possibilities for finding water on the moon. It's important for future trips to the moon and people who might live there someday. As we learn more about how to make water from lunar soil, we get closer to the dream of humans living on the moon. This discovery could help make that dream come true.
(
) 1. What did Chinese scientists discover that amazed the world?
A. A new way to travel to the moon.
B. Ice at the moon's north and south poles.
C. A new method to produce water on the moon.
D. Rocks and soil on the moon can be used for building.
(
) 2. Why does the writer mention the earlier research in paragraph 2?
A. To show that it was totally wrong.
B. To compare it with the new discovery.
C. To prove that there is no running water on the moon.
D. To explain why people wanted to live on the moon before.
(
) 3. How much water may scientists get if they have 1,000g of lunar soil?
(
) 4. What's the writer's attitude towards the dream of humans living on the moon?
A. Hopeful.
B. Worried.
C. Surprised.
D. Doubtful.
