期末复习Unit 4 练习题 2025-2026学年 人教版八年级英语下册

Unit 4 The Wonders of Nature

一、阅读理解

Have you ever heard of the Eternal Flame Falls（永恒火焰瀑布）? It's one of the most special waterfalls on our planet.

The waterfall is in a park in western New York, the USA. As we come close to it, we will smell something like bad eggs.That's the smell of natural methane gas（沼气）produced by ancient rocks that are awfully hot. At the heart of the waterfall is a small flame.

The burning flame has been there for a long time. The locals believe it was created by elves（精灵）.According to them,we may come across one while looking at the flame if we are lucky enough.

Another popular idea about the flame is that it's alive because of the natural gas. It is widely believed that it was first set on fire a hundred years ago. Although the flame once went out, it was lit again right away.

However,Indiana University researchers think differently. The temperature ofthe flame is much higher than the boiling point of water, but their study shows that those rocks are not hot enough to lead to such a result. This means something else keeps the flame alive. However, the researchers are unable to discover the real reason behind it.

Arndt Schimmelmann from the university further explains that this special place has a different way to produce gas.“If there is another way of producing gas, there might be more gas sources（来源）than expected,"he adds.

(    )  .What makes the waterfall smell bad?

A.Water pollution. B.The methane gas. C.The small flame. D.Bad eggs.

(    )2.Which of the following is True about the flame?

A.It burns things that get close. B.It has been burning for long.

C. It was created by an animal. D. It has never gone out.

(    )3. What does the underlined word “one”refer to?

A.The local people. B.The flame. C.The elf. D.The waterfall.

(    )4.The fifth paragraph is mainly about        

A.why the rocks are so hot B.what keeps the flame alive

C.some different opinions on the burning flame D. the result of a research done by a university

(    )5.What's the purpose of the text?

A. To talk about the cause of the flame. B. To call on people to protect the environment.

C. To ask people to visit the Eternal Flame Falls. D. To introduce some special waterfalls to visitors

二、完形填空

Wu Xuexue is a young scientist who studies plants in Tibet. She works at the Chinese Academy of Sciences and is trying to uncover the secrets of     1      plants survive there. Her job is to study different kinds of plants, record their DNA and find safe ways to use medicinal plants without    2 the environment.

In August 2024, Wu and her team were doing some research in Medog County when they      3    a small plant growing between rocks at 800 meters above sea level. After     4 study and DNA checking, they realized it was a completely new genus（种类） and named it Paramicrotoena（藏唇花属）.This discovery helped scientists better understand plant types and showed China's important role in 5 protection.

Wu said that over the years, Tibet has made great    6 to protect its environment.     7    47 nature reserves （保护区）,the area now has its first seed bank, which keeps more than 8,400 seed samples（样本）safe．“All these help young scientists like me do our work with better tools    8 more confidence," she said.

She also 9     thanks to the local Tibetan people who helped her team, including drivers, guides and villagers.Most    10    ,Wu said,"The local people treated us like family. They shared food, showed us the way and encouraged us.That trust is what makes our work possible.”

(    )1.A.how B.when C.where

(    )2.A.harming B.decorating C.improving

(    )3.A.created B.invented C.discovered

(    ) 4.A.easy B.careful C.perfect

(    )5.A.child B.water C.nature

(    )6.A.efforts B.mistakes C.differences

(    ) 7.A.Between B.Without C.Besides

(    )8.A.or B.and C.but

(    ) 9.A.expressed B.refused C.accepted

(    )10.A.sadly B.importantly C.unfairly

三、单项选择