Question

【题目】Like all animal species, plant species must spread their off-spring to suitable areas where they can grow and pass on their parents' genes. Young animals generally spread by walking or flying. Because plants don't have that ability, they must somehow hitchhike(搭顺风车). Some plant seeds scatter by blowing in the wind or floating on water. Many other plant species, though, trick an animal into carrying their seeds. How do they do this? They enclose the seeds within a tasty fruit and advertise the fruit's ripeness by its colour or smell. The hungry animal collects and swallows the fruit, walks or flies off, and later spits out the seeds somewhere far from its parent tree. Seeds can thereby be carried for thousands of miles. It may surprise you to learn that plant seeds can resist digestion. In fact, some seeds actually require passage through an animal's body before they can grow.

Wild strawberries offer a good example of hitchhiking tactics. When strawberry seeds are still young and not yet ready to be planted, the surrounding fruit is green, sour and hard. When the seeds finally mature, the berries turn red, sweet, and tender. The change in the berries'colour serves as a signal to birds which then eat the strawberries, fly off, and eventually spit out the seeds.

Naturally, strawberry plants didn't set out with a conscious intention of attracting birds only when their seeds were ready to be dispersed . Nor did birds set out with the intent of planting strawberries. Rather, strawberry plants evolved through natural selection. The sweeter and redder the final strawberry, the more birds spread its ripe seeds ； the greener and more sour the young strawberry, the fewer birds destroyed the seeds by eating berries before the seeds were ready.

【1】 What does the underlined word "dispersed" in the third para-graph mean?

A. Spread. B. Eaten. C. Born. D. Planted.

【2】 For plants, which of the following is NOT a way of spreading their offspring to suitable areas?

A. Hitchhiking.

B. Blowing in the wind.

C. Floating on water.

D. Tracking an animal.

【3】 Which strategy does the example of wild strawberries describe?

A. The conscious intent of attracting birds.

B. Spreading by walking.

C. Spreading by flying.

D. The strategy of taking a lift.

【4】 Why does the author describe how strawberry seeds are spread?

A. To show plants are good at adapting to the environment.

B. To show strawberry's special way.

C. To show the plant has different ways of spreading seeds.

D. To show the mystery of plant.

【5】 What's the passage mainly about?

A. How animals disperse offspring.

B. How plants disperse their offspring.

C. Plant evolution.

D. Plants'hitchhiking on animals.

Answer 1

【答案】【1】A

【2】D

【3】D

【4】C

【5】B

【解析】[语篇解读]本文讲述植物在动物的帮助下传播自己后代的方式。

【1】本文讲的是植物成熟之后种子的传播。此句话意思：草萄在成熟的时候不是有意吸引鸟儿来帮它们传播种子，因此dispersed的意思是spread “传播”。

【2】第一段第三句出现hitchhike，第四句出现blowing in the wind 和 floating on water，，

【3】草毒成熟之后，被鸟隊食，因而种子被带到各地。这种传播并不是有意识的（A)，也不是通过走路（B)或飞行(C)。

【4】第一段讲述了植物种子的传播有多种方式，第二段中的草莓是其中一个例子。

【5】文章讲述了植物种子的传播。