With rising temperatures there’s concern for some freshwater fish. If the water
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With rising temperatures there’s concernfor some freshwater fish. If the water gets too warm , then it can change theirliving activities .For some species in UK the river water needs to stay below20℃. The problem is as the climate gets warmer so do the streams and rivers.The problem is particularly of concern for the smaller streams and riverswhich respond to air temperature changes much more than the deeper and larger rivers.
The method to keep the temperatures ofrivers down could be as simple as planting woodlands along the river course.Research has shown that trees cover lowland streams can keep watertemperatures 5 ℃ lower than streams running through treeless environments .That5 ℃ can make the difference between the water temperature being habitablefor fish or being too warm for their living .
While it looks like a good method to aproblem , there are things that need to be considered . We need to rememberthat trees are not the favorite habitat of all animals . Some of the habitatsneed open countryside . Trees can also bring their own problems .Anutrient poor stream has its own life . Plant trees alongside it andleaves fall in the stream. Falling leaves can change the nutritional makeup ofthe stream , which will affect the stream and local species of the stream . Youhave to be careful with this type of management, but his method does offer areal chance to help freshwater living things against climate changes andincreasing temperatures.
1.It can be inferred from the text thatsome freshwater fish ______.
| A．have to live in the small streams and rivers |
| B．never need to change their living activities |
| C．are threatened by increasing temperature s |
| D．are becoming rare and expensive in the UK. |
2.An easy method to protect freshwater fishis to ________ .
| A．develop more different fish species |
| B．explore lots of fish protection areas |
| C．make streams run into the deeper rivers |
| D．plant trees around the streams and rivers |
3.Which of the following statements is TRUEabout the method ?
| A．It brings problems if the water grows warmer |
| B．It needs little management . |
| C．It has its advantages and disadvantages |
| D．It is green but costs a great deal of money |
4.What’s the main purpose of the text ?
| A．To help people know more about freshwater fish |
| B．To introduce a method to protect freshwater fish |
| C．To explain why freshwater fish lost their habitat |
| D．To show how the weather affects freshwater fish . |
试题答案
【答案】
1.C细节题：从文章的第一段的句子：If the water gets too warm , then it can change their livingactivities说明答案是C。
2.D 细节题：从文章的第二段的句子：The method to keep the temperatures of rivers down could be assimple as planting woodlands along the river course .说明答案是D。
3.C 细节推理题：从文章的第三段的句子：While it looks like a good method to a problem , there are thingsthat need to be considered .说明这种方法有优点也有缺点。选C。
4.B 主旨题：从最后一段的句子but his method does offer a real chance to help freshwater livingthings against climate changes and increasing temperatures.说明主旨是介绍一种保护淡水鱼的方法。选B。
【解析】略