1. (2019·莲都模拟) 阅读理解

    In the past 2018, there were some amazing achievements in China which not only conquered (征服) the world but also sounded very interesting. Let's have a look at some of them!

The tallest man-made waterfall in the world	In Guiyang, there is a waterfall hanging in front of a building. It's reported that keeping it running costs about 800 yuan per hour, so it has been shown only for less than 10 times. And getting the waterfall ready isn't an easy thing because it's on the top of a 121-meter-tall building.
The first pit (坑) hotel in the world	With 19 floors, this five-star hotel was built nearly 90 meters below the ground in Shanghai. It's the world's lowest building. It costs around 600 dollars for one night. Compared with the height, the cost is pretty high.

1. （1） The tallest waterfall has opened just a few times because of _______.

   A . little water B . its high cost C . no visitors D . its special design
3. （2） What does the writer think of the hotel?

   A . The hotel is very high. B . It's uncomfortable. C . The price is too high. D . It's too low for people to live in.
5. （3） The passage is mainly about _______.

   A . some places of interest in China B . some amazing achievements in China C . the history of some old buildings D . the importance of a modern technology