Every living thing needs to reproduce. Reproducing means creating more members ofyour group. In order for plants to reproduce,they have to spread their seeds(种子)to otherareas.Plants have developed all kinds of ways to do this.
The simplest way is gravity. Many seeds are inside of fruit. When a piece of fruit getstoo heavy, it falls from a tree to the ground. Sometimes animals will pick up the fruit and dropit inanother area.That helps move the seed even farther away. Apples spread this way.
Other plants use wind to spread theirseeds. Dandelions are a good example ofthis. Dandelion seeds are so light that when wind blows,it carriesdandelion seeds to new places. Maple (枫树) seeds also use wind.Their seeds are connected with long, thin leaves that look like
wings. When the seed falls from the tree, its “wings”help it flyfarther from the tree.
Some animals help plants spread their seeds. The animals eat the seeds. While the seed isin the animal’s body,it stays whole. when the seed leaves the animal, it’s in a new place.
Ants also help spread seeds. Some seeds have a special smell that attracts ants. The antsbring the seeds back to their home, which of course is underground. They only eat part of theseed. They leave the rest of the seed underground. After that,the seed can start growing.
根据材料内容选择最佳答案。
31. What does the word “gravity” mean in the second paragraph？
A. The action that makes animals drop seeds.
B. The help that moves seeds even farther away.
C. The need that comes from animals and plants.
D. The force that causes fruit to fall to the ground.
32. How do maples spread their seeds?
A. They use ants.
B. They use wind.
C. They use smells.
D. They use animals.
33. What do ants do tohelp spread seeds?
a. They only eat part of the seed.
b. They help seeds fall from the tree.
c. They carry seeds to the underground home.
d. They pick up the fruit and move it far away.
e. They leave the rest of the seed underground.
A.b, d, e
B. a, b, d
C.a, c, e
D.b, c, d
34. What is the theme(主题)of the text?
A. Natare.
B.Culture.
C. Education.
D.Technology.
35. What’s the best title for the text?
A. How Plants Spread Seeds?
B. Why Animals Pick Up Seeds?
C. How Wind Helps Seeds Spread?
D. Why Seeds Have a Special Trip?
D
A mind map is basically a tool that connects information around a central subject. It canhelp you make a knowledge bank to solve problems. A student recently said, “I thought mindmapping would take a lot of time to do but in fact it saves me time.36
How to make a mind map?Now follow these steps for making wonderful mind maps.
37 Why?Because starting in the center lets your brain spread out in alldirections and express itself more freely and naturally.
Use a picture for your central idea. Why?Because a picture is worth a thousand words and helps you use your imagination.38 It helps get your attention and makesyou work excitedly!
Connect your main branches (分支)to the central picture and connect your second-and-third-level branches to the first and second levels, etc. Why?Because your brain works by connection.39 If you connect the branches, you will understand and remember a lot more easily.
Use one key word every line. Why?Because every single key word can make you learn more clearly and easily.
40 Why?Because each picture, just like the central picture,is also wortha thousand words. So,if you have 10 pictures in your mind map,they are already worth 10,000 words of notes.
Try to use more colors. Why? Because colors are as exciting to your brain as pictures. Color adds great energy to your creative thinking, and is fun!
根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使文章意通顺、内容完整。