But it is a little complicating when you think about it. Sure, the deep, grey lines make an escalator's metal stairs more appealing to the eye. But regular stairs don't have grooves like these; why do escalators need them? Is it because of the movement?

It turns out those grooves serve a more functional purpose. And, yes, it does have to do with the movement, as well as with general cleanliness! Anyone who has ridden an escalator knows that the steps everlastingly circulate from the top to the bottom. You've surely noticed the ridged yellow lip at the top of the escalator. But here's what you may not have noticed: As an escalator's steps flatten, this ridge—also called the comb plate—sweeps away any trash or litter that might have fallen on the stairs. Those grooves lock the step and comb plate together, which makes it harder for any dangerous materials to slide underneath the lip. This prevents foreign objects from getting stuck in that gap, potentially causing the escalator to stop, or worse, break down completely.

That's not the only reason why the grooves were created, though. They are also a good place for water to pool together, protecting you from a bad fall on the slick surface.

So the next time you step on an escalator, take a moment to appreciate those metal grooves. They exist to make sure you get to your office meeting on time.

【1】What are the first two paragraphs trying to say?

A.Millions of people use escalators every year.

B.Few people think much about the grooves.

C.Escalators are complicated machines.

D.Grooves make the stairs look better.

【2】The ridge is mainly designed to____

A.clean off dangerous objects.

B. keep the stairs in movement.

C.flatten the steps.

D.lock the steps.

【3】What does the underlined word "slick” mean in Paragraph 4?

A.Smooth.B.Sticky.

C.Steep.D.Slippery.

【4】What's the passage mainly about?

A.The importance of escalators.

B.The reasons for grooves on stairs.

C.The look of grooves in escalators.

D.The safe ways of riding escalators.

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：

1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

When I first came to senior high school, it was hard for me to keep up in class and near dropped out. The problem was what I was not confident. Then coming Miss Li, my English teacher. She told me to try much hard. Whenever I lost heart, he would encourage me: You can make it. I spent a plenty of time memorizing words. We meet in her office each morning and she would urge me read English for at least 20 minutes. Eventually, something amazed happened and I got high marks in English. I really owe my great progresses to my teacher.

增加：在缺词处加—个漏字符号（∧) ）,并在其下面写出该加的词。

删除：把多余的词用斜线（\ ）划掉,.

修改：在错的词下划一横线，并在该词下面写出修改后的词°

注意：1.每处错误及其修改均仅限--词；

2.只允许修改10处，多者（从第11处起）不计分。

At about 9 o'clock last night, I was busy prepare for my test when a loud noise came through next door. My neighbor watched the football game on TV and kept the sound so much high that I couldn't go on studying. I covered my ear with hands, buried my head in books, and tried even to recite English texts and it was no use. I became impatient and decided to explain my difficult even if he might turned a deaf ear. To his great surprise, after hearing what I said, my neighbor apologized and turned down the TV immediate. Everything was back normal and in 30 seconds, the problem is solved.

为题，给校刊“英语角”写一篇英文稿件。

注意：1．词数不少于60;

2．开头已给出，不计入总词数。

提示词：莫高窟the Mogao Caves

Silk Road Travel

This winter vacation I went to Dunhuang to explore the Silk Road with my classmates．

.

.

.

.

.

.

A.preparedB.having prepared

C.to preparedD.preparing

—No, but we ______. He didn’t return home at all.

A. needn’t have waited

B. couldn’t have waited

C. didn’t need to

D. should wait

A. Homework.B. Exams.C. Books.

A. In a supermarket.B. In a restaurant.C. In the man’s house.

---_______．Some are beneficial and encouraging.

A．You can say it again． B．You have me there.

C．You don’t say． D．You got it.

A. A jacket.B. A hat.C. A sweater.