Let’s try our best to ____ paper to save the ...

Let’s try our best to ____ paper to save the trees.

九年级英语单项填空中等难度题查看答案及解析

—How can we deal with waste paper?

—The best way is to________ it.We can save lots of trees by doing so.

A. clean　　 B. recycle

C. throw　　 D. burn

九年级英语单选题中等难度题查看答案及解析

Let’s try doing the following experiment.

What to do：

Use string to hang a paper clip or other small object at about chest（胸部）level.

Pick up a stick，such as a broom handle. Take three or four steps away from the paper clip.

Now close one eye and walk toward the paper clip. Try to touch it with the tip of the stick. If you miss，try again，still keeping one eye closed. Now try it with both eyes open and see if it’s easier to do.

How it works：

In the experiment，you have to judge how far away the paper clip is. Your brain has several ways of doing this.

One simple way depends on how much your eye has to focus（聚焦）itself. Using only one eye，most people will find it difficult to touch the paper clip on the first try，but the brain still gets some information about distance—though not much.

Your brain can judge distance much better when you look at something with both eyes. In fact，your brain has more than one way to use both eyes in judging distance. For example，to see anything clearly，you have to make both of your eyes point at the object. When you look at a nearby object，your eyes turn inward. You can feel this happening if you look at the tip of your finger and move your finger toward your nose.

Your brain gets information from the eyes about how much they are pointing toward each other. Using that information，the brain can tell how far away any object is，whether it is a basketball or a paper clip.

1.How many materials do we need at least to do the experiment?

A.Two　　　　　　　　 B.Three　　　　　　　　 C.Four　　　　　　　　 D.Five

2.The passage is mainly about that with eyes our brain can judge 　　　　 .

A.how big an object is

B.how high an object is

C.how far away an object is

D.how much information an object is

3.Which of the following is true according to the passage?

A.Our brain judges distance in one way when we use both eyes.

B.Our brain cannot judge the distance of a small object but a big one.

C.How much our eyes focus helps our brain judge the size of an object.

D.How much our eyes focus helps our brain judge the distance of an object.

4.From the experiment we can infer（推断） 　　　　 .

A.with one eye we can see an object as clearly as we use two eyes

B.our eyes turn towards the inside when we look at an object very near

C.within 3 or 4 steps，the nearer an object is，the more clearly we can see it

D.our brain can hardly get any information about distance when we use one eye

九年级英语阅读理解中等难度题查看答案及解析

Let’s try doing the following experiment.

What to do：

Use string to hang a paper clip or other small object at about chest（胸部）level.

Pick up a stick, such as a broom handle. Take three or four steps away from the paper clip.

Now close one eye and walk toward the paper clip. Try to touch it with the tip of the stick. If you miss，try again，still keeping one eye closed. Now try it with both eyes open and see if it’s easier to do.

How it works：

In the experiment, you have to judge how far away the paper clip is. Your brain has several ways of doing this.

One simple way depends on how much your eye has to focus（聚焦）itself. Using only one eye，most people will find it difficult to touch the paper clip on the first try，but the brain still gets some information about distance—though not much.

Your brain can judge distance much better when you look at something with both eyes. In fact, your brain has more than one way to use both eyes in judging distance. For example, to see anything clearly, you have to make both of your eyes point at the object. When you look at a nearby object, your eyes turn inward. You can feel this happening if you look at the tip of your finger and move your finger toward your nose.

Your brain gets information from the eyes about how much they are pointing toward each other. Using that information, the brain can tell how far away any object is, whether it is a basketball or a paper clip.

1.How many materials do we need at least to do the experiment?

A.Two B.Three C.Four D.Five

2.The passage is mainly about that with eyes our brain can judge　　　　 .

A.how big an object is

B.how high an object is

C.how far away an object is

D.how much information an object is

3.Which of the following is true according to the passage?

A.Our brain judges distance in one way when we use both eyes.

B.Our brain cannot judge the distance of a small object but a big one.

C.How much our eyes focus helps our brain judge the size of an object.

D.How much our eyes focus helps our brain judge the distance of an object.

4.From the experiment we can infer（推断）　　　　 .

A.with one eye we can see an object as clearly as we use two eyes

B.our eyes turn towards the inside when we look at an object very near

C.within 3 or 4 steps, the nearer an object is, the more clearly we can see it

D.our brain can hardly get any information about distance when we use one eye

九年级英语阅读单选困难题查看答案及解析

If we don’t try our best to save our world, the future is ___________.

A. common           B. clever            C. hopeless

九年级英语单项填空中等难度题查看答案及解析

The sea turtle is ______. We should try our best to save them.

A. dangerous　　 B. scary　　 C. in danger　　 D. scared

九年级英语单选题中等难度题查看答案及解析

我们应该尽我们最大的努力去拯救所有那些濒危的动物。

We should try our best to save all the animals _________ _________ .

九年级英语完成句子中等难度题查看答案及解析

Let’s try our best ________ the earth.

A protect　　　　　　　　 B. to protect　　　　　　 C. Protects

九年级英语单项填空中等难度题查看答案及解析

It is very important for people to ________paper to save trees.

A．make             B．waste             C．recycle           D．use

九年级英语单项填空中等难度题查看答案及解析

Many children are left alone in the countryside. Let’s try our best ____ them.

A．help B．helping

C．to help D．helps

九年级英语单项填空中等难度题查看答案及解析