Question

【題目】Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back. Plants certainly cannot run away, and they have no teeth or claws. But plants can still protect themselves in both physical and chemical ways.

Some plants have their own ways to keep animals away. For example, the leaves of the hollies(冬青樹) havesharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more prickles thanleaves on upper branches. This is because the lower leaves are easier for most animals to reach.

Some plants, such as the oak trees(橡樹), have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material，so eating such grasses wears down the animal's teeth

Many plants also have the chemical defense. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may protect themselves by increasing the production of these chemicals. When a worm(毛蟲) bites a tobacco leaf, the leaf produces a chemical smell.

Many plants depend on both physical and chemical defense. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous water(毒液).Only one experience with this kind of plant will teach an animal to stay away from it in the future.

【1】What can a plant do when it is under attack?

A. It can protect itself

B. It can run away.

C. It can fight back.

D. It must die.

【2】Why do the leaves of the hollies have sharp prickles according to the passage?

A. Because they are lower.

B. Because they are beautiful to watch.

C. Because they stop people from picking..

D. Because they make grass-eating animals stay away.

【3】How does an oak tree protect itself?

A. It has leaves with a delicious material.

B. It has leaves with sharp prickles.

C. It has thick and hard leaves.

D. Its leaves taste bitter.

【4】What does the underlined word“sandy” mean in Chinese?

A. 含鹽的 B. 含沙的 C. 壞掉的 D. 腐爛的

【5】Which of the following is TRUE according to the passage?

A. The hollies have thick and hard leaves.

B. The oak trees have leaves with poisonous water

C. A plant has only one kind of way to protect itself, physical one or chemical one.

D. A tobacco leaf produces a chemical smell when a worm bites it.

Answer 1

【答案】

【1】A

【2】D

【3】C

【4】B

【5】D

【解析】本文介紹了當植物受到攻擊時，它可以通過物理的或化學的方式保護自己。

【1】A

細節(jié)理解題。根據Plants certainly cannot run away, and they have no teeth or claws. But plants can still protect themselves in both physical and chemical ways.可知當植物受到攻擊時，它可以通過物理的或化學的方式保護自己，故選A。

【2】D

細節(jié)理解題。根據Some plants have their own ways to keep animals away. For example, the leaves of the hollies(冬青樹) havesharp spines (刺) that discourage grass-eating animals.可知冬青樹上有鋒利的刺，是為了讓食草動物遠離它，故選D。

【3】C

細節(jié)理解題。根據Some plants, such as the oak trees(橡樹), have thick and hard leaves that are difficult for animals to eat.可知橡樹長有又厚又硬的樹葉來保護自己不被動物吃掉，故選C。

【4】B

詞義猜測題。根據so eating such grasses wears down the animal's teeth可知吃這樣的草會讓動物的牙齒磨損，故猜測這種草里含沙，故選B。

【5】D

細節(jié)理解題。根據When a worm(毛蟲) bites a tobacco leaf, the leaf produces a chemical smell.可知當毛毛蟲叮咬煙草葉子時，那個葉子會產生一種化學味道，故選D。