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Ⅳ. 阅读理解，选择最佳选项。
We sometimes say the lion is "the king of the forest" because it is stronger and more dangerous than other animals. It can run faster than most animals and it can hunt other beasts (兽). It is said that the lion is the highest animal in the land food chain (食物链). In the sea, people say the shark is at the top of the food chain. It can swim faster than most of other sea animals. It can also catch other sea animals and eat them.
What is at the top of the world's food chain? Human beings! We are not the biggest or fastest, but we are the cleverest. We could not run faster than most animals, so we invented (发明) cars. We could not fight better than a lion, so we invented guns (枪).
People's inventions are useful, but they can be dangerous, too. For example, people used guns to kill a lot of wild wolves. The wild wolves usually eat sheep. But in recent (近来的) years, the number of wild rabbits is becoming larger and larger because the number of wild wolves is getting smaller and smaller. The wild rabbits competed for the grass with the sheep and the cows. Much of the grassland became desert because the rabbits ate the grass.
Remember that we are a part of the food chain, so we are in danger, too! If we love animals, we are loving ourselves.
(
A. The dolphin.
B. The shark.
C. Sea animals.
D. The lion.
(
A. Because we can use guns.
B. Because we are the biggest.
C. Because we are the cleverest.
D. Because we can drive cars.
(
A. Looked for.
B. Hunted for.
C. Cared for.
D. Fought for.
(
A. To protect the food chain is to protect ourselves.
B. The lion is the highest animal in the land food chain.
C. People's inventions can't break the food chain.
D. The number of wild rabbits is getting smaller because of people's inventions.
We sometimes say the lion is "the king of the forest" because it is stronger and more dangerous than other animals. It can run faster than most animals and it can hunt other beasts (兽). It is said that the lion is the highest animal in the land food chain (食物链). In the sea, people say the shark is at the top of the food chain. It can swim faster than most of other sea animals. It can also catch other sea animals and eat them.
What is at the top of the world's food chain? Human beings! We are not the biggest or fastest, but we are the cleverest. We could not run faster than most animals, so we invented (发明) cars. We could not fight better than a lion, so we invented guns (枪).
People's inventions are useful, but they can be dangerous, too. For example, people used guns to kill a lot of wild wolves. The wild wolves usually eat sheep. But in recent (近来的) years, the number of wild rabbits is becoming larger and larger because the number of wild wolves is getting smaller and smaller. The wild rabbits competed for the grass with the sheep and the cows. Much of the grassland became desert because the rabbits ate the grass.
Remember that we are a part of the food chain, so we are in danger, too! If we love animals, we are loving ourselves.
(
B
) 1. Which is at the top of the food chain in the sea?A. The dolphin.
B. The shark.
C. Sea animals.
D. The lion.
(
C
) 2. Why are people at the top of the world's food chain?A. Because we can use guns.
B. Because we are the biggest.
C. Because we are the cleverest.
D. Because we can drive cars.
(
D
) 3. What does the underlined phrase "competed for" mean?A. Looked for.
B. Hunted for.
C. Cared for.
D. Fought for.
(
A
)4. What does the writer want to tell us in the text?A. To protect the food chain is to protect ourselves.
B. The lion is the highest animal in the land food chain.
C. People's inventions can't break the food chain.
D. The number of wild rabbits is getting smaller because of people's inventions.
答案
1.B
2.C
3.D
4.A
2.C
3.D
4.A
解析
【分析】
解答这篇阅读理解需先通读全文，把握文章围绕食物链展开的核心内容，再针对每个题目回到原文定位关键信息：第1题对应海洋食物链顶端的动物，第2题对应人类处于世界食物链顶端的原因，第3题结合上下文猜测短语含义，第4题提炼文章主旨，逐一匹配选项得出答案。
【解析】
1. 细节理解题：根据原文第一段“In the sea, people say the shark is at the top of the food chain.”可知，海洋食物链顶端的是鲨鱼，故选B。
2. 细节理解题：根据原文第二段“What is at the top of the world's food chain? Human beings! We are not the biggest or fastest, but we are the cleverest.”可知，人类处于世界食物链顶端是因为我们最聪明，故选C。
3. 词义猜测题：结合上下文，狼数量减少后兔子增多，兔子和牛羊争夺草，“competed for”意为“争夺”，对应选项D“Fought for”（为……争斗），故选D。
4. 主旨大意题：根据原文最后一段“Remember that we are a part of the food chain, so we are in danger, too! If we love animals, we are loving ourselves.”可知，作者想告诉我们保护食物链就是保护自己，故选A。
【答案】
1.B
2.C
3.D
4.A
【知识点】
阅读理解（细节理解）、词义猜测题、主旨大意题
【点评】
本文围绕食物链展开，考查学生对原文细节的查找、词义的猜测及主旨的提炼，整体难度适中，需学生仔细定位原文信息，理解上下文逻辑。
【难度系数】
0.6
解答这篇阅读理解需先通读全文，把握文章围绕食物链展开的核心内容，再针对每个题目回到原文定位关键信息：第1题对应海洋食物链顶端的动物，第2题对应人类处于世界食物链顶端的原因，第3题结合上下文猜测短语含义，第4题提炼文章主旨，逐一匹配选项得出答案。
【解析】
1. 细节理解题：根据原文第一段“In the sea, people say the shark is at the top of the food chain.”可知，海洋食物链顶端的是鲨鱼，故选B。
2. 细节理解题：根据原文第二段“What is at the top of the world's food chain? Human beings! We are not the biggest or fastest, but we are the cleverest.”可知，人类处于世界食物链顶端是因为我们最聪明，故选C。
3. 词义猜测题：结合上下文，狼数量减少后兔子增多，兔子和牛羊争夺草，“competed for”意为“争夺”，对应选项D“Fought for”（为……争斗），故选D。
4. 主旨大意题：根据原文最后一段“Remember that we are a part of the food chain, so we are in danger, too! If we love animals, we are loving ourselves.”可知，作者想告诉我们保护食物链就是保护自己，故选A。
【答案】
1.B
2.C
3.D
4.A
【知识点】
阅读理解（细节理解）、词义猜测题、主旨大意题
【点评】
本文围绕食物链展开，考查学生对原文细节的查找、词义的猜测及主旨的提炼，整体难度适中，需学生仔细定位原文信息，理解上下文逻辑。
【难度系数】
0.6
