Ⅱ.阅读理解
A
The natural world is colourful with humans, plants and animals showing different colours.
Human skin can be many different colours and it changes with the sun, our feelings and our health. This is because of pigments(色素), which reflect light and make what the eye sees as colours. So, when we feel excited or angry, our heart can send more blood to the face and the pigments in the skin become red. This is why we have the expression that someone "sees red" when they are angry.
Plants also have pigments. Colours are important for them to live on. The bright colours of flowers catch the attention of insects, which then carry their pollen(花粉) from one flower to another. Bees can see colours we cannot, and they follow them to the inside of the flower. Without bees visiting flowers in this way, many plants would die out.
Animals also use colours for their own need. They protect themselves with different colours so that they will not be seen by predators easily. The snowshoe hare for example, a kind of wild rabbit, changes colours with seasons for this reason. During summer it is a brown colour, and in winter it is white so that it can hide in the snow. However, some animals use colours as a warning to make predators stay away. Bright colours such as yellow and red are often used in this way. Nature, however, is very clever, and predators also use colours to attract the animals they feed on.
So, we can see that there may be many different reasons and uses for colours in the natural world. Some uses of colours in nature remain unknown, but one thing is for sure: colours not only make our planet beautiful but they are also necessary for our planet to live on.
(
A. Sunshine. B. Feeling. C. Pigment. D. Blood.
(
A. Leaves. B. Fruits. C. Pollen. D. Colours.
(
A. Animals which hide in secret places.
B. Animals which kill other animals for food.
C. Animals which change colours with the sun.
D. Animals which protect themselves from danger.
(
A
The natural world is colourful with humans, plants and animals showing different colours.
Human skin can be many different colours and it changes with the sun, our feelings and our health. This is because of pigments(色素), which reflect light and make what the eye sees as colours. So, when we feel excited or angry, our heart can send more blood to the face and the pigments in the skin become red. This is why we have the expression that someone "sees red" when they are angry.
Plants also have pigments. Colours are important for them to live on. The bright colours of flowers catch the attention of insects, which then carry their pollen(花粉) from one flower to another. Bees can see colours we cannot, and they follow them to the inside of the flower. Without bees visiting flowers in this way, many plants would die out.
Animals also use colours for their own need. They protect themselves with different colours so that they will not be seen by predators easily. The snowshoe hare for example, a kind of wild rabbit, changes colours with seasons for this reason. During summer it is a brown colour, and in winter it is white so that it can hide in the snow. However, some animals use colours as a warning to make predators stay away. Bright colours such as yellow and red are often used in this way. Nature, however, is very clever, and predators also use colours to attract the animals they feed on.
So, we can see that there may be many different reasons and uses for colours in the natural world. Some uses of colours in nature remain unknown, but one thing is for sure: colours not only make our planet beautiful but they are also necessary for our planet to live on.
(
C
) 1. What is the cause that makes human skin change colours according to paragraph 2?A. Sunshine. B. Feeling. C. Pigment. D. Blood.
(
D
) 2. What can plants use to attract insects according to paragraph 3?A. Leaves. B. Fruits. C. Pollen. D. Colours.
(
B
) 3. What does the underlined word "predators" in paragraph 4 mean?A. Animals which hide in secret places.
B. Animals which kill other animals for food.
C. Animals which change colours with the sun.
D. Animals which protect themselves from danger.
(
B
) 4. What is the structure of the passage?答案：1. C
2. D
3. B
4. B
2. D
3. B
4. B