Unit 5Amazing nature Presenting ideas（单元综合提升练)(含解析)外研版（2024）七年级下册

Presenting ideas（单元综合提升练）
Ⅰ.阅读理解【主题：人与自然　树叶为什么会变颜色】
Why do the leaves on trees have different colours What makes them change their colours Leaves use sunlight, water, and air to make food for the trees. This way of making food is called photosynthesis. Photosynthesis is important to animals as well as plants. Some animals eat plants. Other animals eat these animals.
Summer is playtime. For the leaves of many trees, however, it's work, work, work! The Sun is shining. The leaves are making food for the trees. The trees keep more than enough food deep inside. Leaves are green in summer because they are making food. Leaves also have orange, yellow, or brown colours inside them. During summer, those colours are covered by the green colour.
Many places get colder in fall with shorter days and longer nights. Trees get less sunlight, so photosynthesis slows down. Over time, leaves stop making the green chemical. The hidden orange, yellow, and brown colours grow when that happens.
Once it gets cold enough and ice appears at night, the trees drop their leaves. They do this to keep themselves safe. If the leaves turn to ice while still on the trees, the trees can be hurt. Trees that drop their leaves are bare(光秃秃) in winter. They use the food they save in summer to get through the cold days and nights.
Spring comes before long. Ice and snow disappear and the rains come. The Sun shines, and tiny leaves grow from branches. Once again, the leaves use sunlight, water, and air to make food. The cycle(循环) begins again.
(　　)1.What is photosynthesis according to the passage
A．A way of growing leaves.
B．A way of changing colours.
C．A way for animals to eat plants.
D．A way to make food for plants.
(　　)2.According to the second paragraph, why are leaves green in summer
A．Because trees are making food for leaves.
B．Because they are busy making food for trees.
C．Because there is no other colour inside leaves in summer.
D．Because summer is playtime for the leaves of many trees.
(　　)3.What stops leaves from making the green chemical in fall
A．Less air in fall. B．Less time in fall.
C．Less water in fall. D．Less sunlight in fall.
(　　)4.Where are you most likely to read this passage
A．In a science magazine. B．In a storybook.
C．In an art textbook. D．In a history book.
Ⅱ.(2024辽宁大连期末)阅读五选四【主题：人与自然　北极的地理状况】
We often think the Arctic only has snow and ice. But in fact, it has far more than that! 1.________ The Arctic Ocean makes up two thirds of the Arctic, while one third is made up of land in eight countries, including Russia, Canada, and the US.
The Arctic lands have many various lives. Some plants and animals can grow in very cold temperatures. 2.________ There are whales, Arctic foxes and many more. The polar bear is the most famous Arctic animal. You might think that the Arctic is too cold for people to live in. 3.________ That's the same population as the city of Taiyuan in Shanxi, China. About 10 percent are local people. They have been there for thousands of years. They make a living by fishing, hunting and so on.
A group of scientists recently came back from a one-year-long study in the Arctic. They have bad news: the Arctic is dying. The amount(数量) of Arctic sea ice is falling by around 3 percent every year. 4.________ What does this mean for us Many animals, such as polar bears, hunt for their food on the ice. If they can't do this anymore, they will die of hunger. Local people hunt animals for food. But since so many animals are dying, they need to change their way of life.
A．The Arctic is on top of Earth.
B．So there are a few people living there.
C．In fact, the Arctic is home to more than 21，000 kinds of lives.
D．There will be no more ice during the summer in the near future.
E．But surprisingly, there are about 4 million people living there.
Ⅲ.完形填空【主题：人与自然　水循环】
Water is important for all living things on Earth. The water cycle is a natural process that takes water from the ground and the sky and __1__ it back to the earth again. It is a cycle that happens the whole year and is the most active from March __2__ June in China. In this article, we will explore(探索) the water cycle and discuss its importance for Earth.
The water cycle always begins with water vapor(蒸气). When it's hot outside, you can see clouds forming in the sky. These clouds are __3__ water vapor that comes from the ground, plants and rivers. As water vapor rises into the sky, it cools down and becomes clouds. After that, clouds travel __4__ the sky and fall back to Earth as rain or snow. Then, water runs through rivers and oceans and finally returns to the earth again in different forms like rainwater or snow.
The water cycle plays an important role in protecting our Earth's climate(气候). It __5__ us with water to drink and keeps our climate healthy. On top of that, it takes water from rivers and oceans and brings it to the areas that __6__ enough water. Without the cycle, we would face many problems. When there is __7__ water in one place, it becomes a flood. When water is badly in need, it becomes a drought(旱灾). Besides, water vapor can take in heat from the sun and keep Earth __8__．
The water cycle is a natural process that keeps our planet alive.__9__ important for plants and animals to drink water and for our rivers to stay flowing. Understanding the water cycle can help us enjoy the beauty of nature, know how our planet works and develop __10__ methods to protect Earth. And that is a responsibility we should take on.
(　　)1.A. brought B．pulls C．brings D．gave
(　　)2.A. in B．of C．at D．to
(　　)3.A. made of B．made in C．made up D．made into
(　　)4.A. across B．through C．off D．past
(　　)5.A. offers B．gives C．supports D．provides
(　　)6.A. doesn't have B．don't have C．didn't have D．hasn't had
(　　)7.A. too much B．much too C．too many D．many too
(　　)8.A. cold B．hot C．cool D．warm
(　　)9.A. Those are B．These are C．They're D．It's
(　　)10.A. better B．well C．best D．good
【详解答案】
Ⅰ.【语篇解读】本文介绍了树叶为什么会变颜色。
1．D　解析：细节理解题。根据第一段中的“Leaves use sunlight, water, and air to make food for the trees. This way of making food is called photo-synthesis.”可知，树叶利用阳光、水和空气为树木提供食物。这种制造食物的方式被称为光合作用。故选D。
2．B　解析：细节理解题。根据第二段中的“Leaves are green in summer because they are making food.”可知，树叶在夏天是绿色的，因为它们在忙于制造食物。故选B。
3．D　解析：细节理解题。根据第三段中的“Trees get less sunlight, so photosynthesis slows down. Over time, leaves stop making the green chemical.”可知，在秋天树木得到的阳光较少，因此光合作用减慢。随着时间的推移，叶子停止制造绿色化学物质。故选D。
4．A　解析：文章出处题。通读全文可知，本文主要介绍了树叶为什么会变颜色的自然现象，最有可能出现在科学杂志中。故选A。
Ⅱ.【语篇解读】本文介绍了北极的地理情况，包括生活在北极的生命以及北极如今面临的危险——冰川融化。
1．A　解析：根据下文“The Arctic Ocean makes up two thirds of the Arctic, while one third is made up of land in eight countries, including Russia, Canada, and the US.”可知，此处介绍了北极的地理情况，选项A“北极在地球之巅。”符合语境。故选A。
2．C　解析：根据上文“The Arctic lands have many various lives. Some plants and animals can grow in very cold temperatures.”及下文“There are whales, Arctic foxes and many more.”可知，此处介绍了北极的生物，选项C“事实上，北极是超过21 000种生命的家园。”符合语境。故选C。
3．E　解析：根据上文“You might think that the Arctic is too cold for people to live in.”以及下文“That's the same population as the city of Taiyuan in Shanxi, China.”可知，此处介绍了北极的人口，选项E“但令人惊讶的是，大约有400万人居住在那里。”符合语境。故选E。
4．D　解析：根据上文“The amount(数量) of Arctic sea ice is falling by around 3 percent every year.”可知，此处介绍了北极海冰的数量在逐年下降，选项D“在不久的将来，夏天不会再有冰了。”符合语境。故选D。
Ⅲ.【语篇解读】本文主要介绍了地球上的水循环。了解水循环可以帮助我们享受自然之美，了解地球是如何运作的，并找到更好的方法来保护地球。
1．C　解析：句意：水循环是一个自然过程，它将水从地面和天空中带走，并将其再次带回地球。brought“带来”，过去式；pulls“拉”，动词第三人称单数形式；brings“带来”，动词第三人称单数形式；gave“给”，过去式。根据“it back to the earth again”可知，此处指把它再次带回地球，bring sth.back to“把某物带回……”，根据takes可知，此空应填动词第三人称单数形式。故选C。
2．D　解析：句意：这是一个全年发生的循环，在中国从3月到6月最为活跃。in“在……里面”；of“……的”；at“在”；to“到”。from...to...“从……到……”，是固定搭配。故选D。
3．A　解析：句意：这些云是由来自地面、植物和河流的水蒸气构成的。(be) made of“由……构成”；(be) made in“产自……”；(be)made up“由……组成”，后通常有of；(be) made into“被制成……”。根据“These clouds are...water vapor”可知，这些云是由水蒸气构成的。故选A。
4．B　解析：句意：在那之后，云穿过天空，以雨或雪的形式落回地球。across“从表面横穿”；through“从内部穿过”；off“离开”；past“经过”。根据“clouds travel...the sky”可知，云朵穿过天空，指穿过天空的内部，应填through。故选B。
5．D　解析：句意：它为我们提供饮用水，并保持我们的气候健康。offers“主动提供”；gives“给”；supports“支持”；provides“提供”。根据“us with water”可知，此处考查provide sb.with sth.，表示“给某人提供某物”。故选D。
6．B　解析：句意：除此之外，它从河流和海洋中取水，并将其带到缺水的地区。doesn't have“没有”，第三人称单数形式；don't have“没有”，原形；didn't have“没有”，过去式；hasn't had“没有”，现在完成时。此句在陈述客观事实，为一般现在时，that引导定语从句，先行词areas是复数形式，应填don't have。故选B。
7．A　解析：句意：当一个地方有太多的水时，它就变成了洪水。too much“太多”，修饰不可数名词；much too“太”，修饰动词或形容词；too many“太多”，修饰可数名词；many too无此搭配。此空修饰不可数名词water。故选A。
8．C　解析：句意：此外，水蒸气可以吸收太阳的热量，使地球保持凉爽。cold“寒冷的”；hot“热的”；cool“凉爽的”；warm“暖和的”。根据“Besides, water vapor can take in heat from the sun and keep Earth”可知，吸收了太阳的热量，地球就能凉爽起来，“keep...＋形容词”，表示“保持……”。故选C。
9．D　解析：句意：它对于动植物饮水和使我们的河流保持流动来说很重要。Those are“那些是”；These are“这些是”；They're“他/她/它们是”；It's“它是”。此处用It代指前文提到的water cycle。故选D。
10．A　解析：句意：了解水循环可以帮助我们欣赏大自然的美丽，了解我们的星球是如何运作的，并制定更好的方法来保护地球。better“更好的”；well“好”；best“最好的”；good“好的”。此处含有比较之意，即寻找更好的方法保护地球。故选A。