题目内容
【题目】根据短文理解,选择正确答案。
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two kinds of animals come together in a partnership (伙伴关系) which is good for both of them. You may have noticed some birds sitting on the backs of sheep. This is not because they want a ride, but because they find easy food in the parasites (寄生虫) on sheep. The sheep allow the birds to do so because they remove the cause of discomfort. So although they can manage without each other, they do better together.
Sometimes an animal has a plant partner. The relationship develops until the two partners cannot manage without each other. This is so in the corals(珊瑚) of the sea. In their skins they have tiny plants which act as “dustmen”, taking some of the waste products from the coral and giving in return oxygen which the animal needs to breathe. If the plants are killed, or are even prevented from receiving light so that they cannot live normally, the corals will die.
(1)Some birds like to sit on a sheep because _______.
A.they can eat its parasites
B.they enjoy travelling with the sheep
C.they depend on the sheep for existence
D.they find the position most comfortable
(2)The underlined word “they” in the last sentence of the first paragraph refers to ______.
A.birds and parasites
B.birds and sheep
C.parasites and sheep
D.sheep, birds and parasites
(3)We learn from the text that corals depend on plants for______.
A.comfort
B.light
C.food
D.oxygen
(4)What does the second paragraph mainly discuss?
A.Some animals and plants depend on each other for existence[
B.Some animals and plants develop their relationship easily.
C.Some plants depend on each other for food.
D.Some animals live better together.
【答案】
(1)A
(2)B
(3)D
(4)A
【解析】动物与其他不同种类的动物之间除了食物链的关系,通常很少有牵连。但是两种动物之间还有可能建立起一种伙伴关系,从而共生共赢。有时候动物和植物之间也是如此。
⑴A。细节理解题。从第一段You may have noticed some birds sitting on the backs of sheep….because they find easy food in the parasites (寄生虫) on sheep.可以得出答案。
⑵B。猜测词义题。从第一段倒数第二和第三得知,羊和羊背上的鸟之间彼此需要。尽管离了彼此一样能活,但是在一起会更有利。they是指the sheep和the birds.
⑶D。细节理解题。第二段In their skins they have tiny plants which act as “dustmen”, taking some of the waste products from the coral and giving in return oxygen which the animal needs to breathe,珊瑚靠植物供给它赖以呼吸的氧气。
⑶A。主旨大意题。第二段的首句是本段的主题句,说明动物和植物之间也会有伙伴关系,并且拿珊瑚和它身上的植物作为例子。故选A。