B
The Yangtze River is the longest river in China and the third longest river in the world. 1.
F
It is about 6,360 kilometres long. It starts from the Tanggula Mountains and runs through Qinghai, Xizang, Sichuan, Yunnan and so on. 2.
A
During the long history of ancient China, this river helped feed millions of people and develop amazing cultures. The important cities such as Shanghai and Nanjing are sitting along the river.
3.
D
In the past, the water in it was clean but now it is dirty. A lot of fish died because of water pollution. Luckily, people realized the importance of protecting the Yangtze River. A programme was set up in 1989 to protect the water and land around the river. It was successful because it helped improve the environment. 4.
C
It helps protect white - flag dolphins, one of the rarest animals in the world. The number of white - flag dolphins in China dropped because of the pollution in the Yangtze River.
5.
B
However, we still have a long way to go to protect the great river. Let’s work together to help our mother river become as clean as it used to be.
A. Finally it runs into the East China Sea.
B. So far, we’ve made some achievements.
C. The other programme is about endangered animals.
D. However, the Yangtze River also faces some problems.
E. A great programme teaches children about endangered animals.
F. It is just after the Nile in Africa and the Amazon in South America.
解析：
【分析】
这是一道英语语篇补全（七选五）题型，解题核心是通过梳理上下文的语义逻辑、指代关系、前后内容的呼应关系来匹配选项。首先逐空定位前后文的关键信息：第一空前文刚提到长江是世界第三长河，需要找到和“世界第三长”排名对应的选项；第二空前文介绍长江的发源地和流经区域，按照河流介绍的常规行文逻辑，接下来要补充长江的最终流向；第三空后文开始介绍长江的污染等负面问题，需要找到能承接前文长江的贡献、引出后文问题的过渡句；第四空后文提到保护稀有动物白鳍豚的相关内容，前文刚介绍完第一个环保项目，需要找到对应濒危动物保护项目的选项；第五空后文用转折词However说明保护长江仍有很长的路要走，空格处需要填入和“已有进展”相关的内容，顺着这个思路就能逐一匹配出正确答案。
【解析】
1. 第一空：前文点明长江是世界第三长河，F选项“It is just after the Nile in Africa and the Amazon in South America.”（它仅次于非洲的尼罗河和南美洲的亚马逊河）刚好对应“世界第三长”的排名描述，语义衔接顺畅，选F。
2. 第二空：前文依次介绍了长江的长度、发源地、流经的多个省份，按照地理介绍的逻辑，后续补充长江的入海口信息，A选项“Finally it runs into the East China Sea.”（最终它流入东海）符合行文逻辑，选A。
3. 第三空：前文全部在介绍长江对中国历史、沿岸城市的重要作用，后文转而介绍长江水质变差、鱼类死亡的污染问题，D选项“However, the Yangtze River also faces some problems.”（然而，长江也面临一些问题）起到完美的承上启下过渡作用，选D。
4. 第四空：前文提到1989年设立了保护长江流域水土的项目，后文介绍对白鳍豚这类稀有濒危动物的保护，C选项“The other programme is about endangered animals.”（另一个项目是关于濒危动物的）刚好衔接前后两个不同的保护项目，引出后文的动物保护内容，选C。
5. 第五空：后文用转折词However说明“保护这条伟大的河流我们仍然有很长的路要走”，说明空格处要表达已经取得部分成果的含义，B选项“So far, we’ve made some achievements.”（到目前为止，我们已经取得了一些成就）和后文的转折逻辑完全匹配，选B。
【答案】
1~5. FADCB
【知识点】
语篇逻辑衔接，阅读补全
【点评】
本题属于中等难度的阅读补全类题型，考点集中在对行文脉络逻辑的把控，不需要过难的词汇储备，学生只要抓住前后文的呼应关系、转折过渡信号、常识性的介绍逻辑就可以顺利解题，同时题目内容围绕长江生态保护展开，兼具语言考察和科普教育的意义。
【难度系数】
0.6
