题目内容
Li Bing was born during the Warring States Period. He was an official from the State of Qin. Around 277 B. C.，Li Bing received an order which controlled the flood in Chengdu.
With that special task in mind，Li Bing did very wide field study in and around Chengdu. Around 256 B. C.，he and his son decided to put their idea to the test. They built Dujiangyan about 56 kilometers ( or 35 miles) west of Chengdu. Their design had three important parts.
The first part is called Yuzui. Yuzui means "fish mouth" in Chinese. It was a man-made island. It controls how much water each stream gets. The second part is called Feishayan. It is really a spillway(泄洪道)that forces the sand and little stones from the inner river to the outer river. The third part is called Baopingkou. It controls how much water from the inner(内部的)river is to be used for irrigation(灌慨).
Li Bing and his son spent nearly five years on building Dujiangyan. They finished it around 251 B. C.
By today's standard, Dujiangyan may be not so prefect. But to truly appreciate(欣赏) Dujiangyan,we must remember that it was built more than 2,200 years ago. Back then,the Chinese did not have any modern machines. But they still made many great things they had on hand. Just like that,they built Dujiangyan. It is amazing, isn't it?
根据短文内容，选择最佳答案。
( ) 1. When did Li Bing begin to built Dujiangyan?
A. Around 277 B. C.
B. Around 256 B.C.
C. Around 251 B.C.
D. Around 246 B.C.
( ) 2. How long is Dujiangyan?
A. 56 kilometers.
B. 35 miles.
C. 2 ，200 meters.
D. This passage didn't tell us.
( ) 3. What's the man-made island in Dujiangyan used for?
A. Forcing the sand and little stones from the inner river to the outer river.
B. Controlling how much water from the inner river.
C. Controlling how much water each stream gets.
D. Controlling how much water is used for irrigation.
( ) 4. Which of the following is NOT true according to the last paragraph?
A. Dujiangyan wasn't prefect at that time.
B. Dujiangyan was built over 2， 200 years ago.
C. Ancient Chinese made many great things by hand.
D. The writer thinks Dujiangyan is amazing.
( ) 5. What's the passage about?
A. Dujiangyan.
B. Li Bing and Dujiangyan.
C. Li Bing.
D. Li Bing and his son.
l.B 由第二段第二句以及第四段内容可知，李冰着手修建都江堰开始于公元前256年。
2. D本文没有告诉我们都江堰的长度，第二段的两个距离指都江堰到成都的距离。
3. C由第三段的第三句可知，人工岛是用来分洪的。
4. A 由最后一段第一句可知，以现在的标准看来，都江堰可能会不完美，但都江堰建于2200多年前。言外之意，当时的都江堰是很成功的。
5. B 本文主要介绍李冰和他所修建的都江堰。
