《2025年通城学典组合训练八年级英语全一册人教版辽宁专版》

C
KEY→P27
范畴:人与自然
主题:自然生态
体裁:说明文
难度:★★★★
建议用时:7 分钟
评价:____/4
From red apples to green melons, fruits come in many different colors. Why do different kinds of fruits have so many colors?
According to a scientist, fruit colors actually come from their different pigments (色素), such as red or yellow carotenoid and blue or purple anthocyanin. These pigments appear in different amounts, depending on the fruit's environment. This causes the fruit to turn a certain color.
To find out how the environment affects fruit colors, Chinese scientists studied more than 280 different fruit colors, including white, red, blue, purple and black.
They found that red fruits mainly grow in cooler places. And instead of just growing in one place, you can find them growing in many places around the world. Blue and purple fruits mostly grow in warm places. These fruits grow a lot in just one specific (特定的) area. The scientists also found that the closer the fruit is to the equator (赤道), the darker its color will be.
Animals have also had the powerful effect on the evolution (进化) of fruit colors. Animals eat fruits and drop the seeds in other places later. This helps the fruit spread and grow in different places. Therefore (因此), in order to attract animals, some fruits develop colors that are easy for animals to see.
However, animals see colors in a different way. Fruits need to develop colors that are suited to animals' visual abilities. For example, birds can see red more easily than humans. Therefore, there are more red fruits in areas where birds live.
(A)1. Which of the following is TRUE?
A. Fruits grown close to the equator may be dark in color.
B. Green fruits usually grow in cool places.
C. Humans can see red more easily than birds.
D. Birds are color-blind and can see no colors.
(C)2. Some fruits develop certain colors to ____.
A. let animals run away
B. take in more sunlight
C. make animals eat them
D. protect themselves
(A)3. 新考法·组合式选择 Which of the following factors have influenced the evolution of fruit colors?
a. The environment.
b. Pigments.
c. Animals.
d. Humans' visual abilities.
A. abc
B. bcd
C. acd
D. abd
(D)4. The best title for the passage may be “____”.
A. What colors are different fruits?
B. How many colors do fruits have?
C. When do people grow colorful fruits?
D. Why do fruits have different colors?

答案： 1. A 细节理解题。由第四段中“The scientists also found that the closer the fruit is to the equator, the darker its color will be.”可知，水果生长在离赤道越近的地方，颜色就越深。
2. C 推理判断题。由第五段中“Animals eat fruits .... Therefore, in order to attract animals, some fruits develop colors that are easy for animals to see.”可知，一些水果会进化成特定的颜色是为了让动物看到它们，从而让动物把它们吃掉。
3. A 细节理解题。由全文内容可知，色素、环境以及动物等因素会影响水果颜色的进化。
4. D 标题概括题。通读全文内容可知，本文主要介绍了水果有不同颜色的原因。