No one knows for sure when a fire will happen...

No one knows for sure when a fire will happen, so it is 1.　 (extreme) necessary to make preparations before a fire starts. Check the fire escape equipment in advance and make sure that you can find 2. in the dark when lights have failed. Find out 3. the nearest fire extinguisher(灭火器) is and read the instructions to learn how 　 4. (use) it.

Don’t lose your head when a fire breaks out. First, telephone the fire department immediately when 　 5.　 fire just gets started. Take care not to be overcome by smoke,　 6.　　 can kill you quickly. Cover your mouth 　 7. a wet towel or cloth, and avoid getting into the smoke. Don’t get in an elevator, as you may get trapped if the electricity 8.　 (fail). If you can not get away 　 9. yourself, it is of great importance to hang something out of the window to attract attention as a sign of asking for help.

In short, if you make preparations before hand and take precautions(预防措施) during the fire, chances are that 10. will survive in case of a fire if it really breaks out some day.

高一英语语法填空中等难度题查看答案及解析

What will the city of the future look like? No one knows for sure, and making1.______(predict) is a risky business. But one thing is certain-they are going to get bigger before they get smaller. In the future, care for the environment will become very important 2._______earth’s natural resources run out. We will use lots of3._______(recycle) materials, such as plastic, steel, glass, wood and paper, and we will waste fewer natural4._______.We will also have to rely more5. _______ alternative energy, such as solar and wind power. All this seems certain, but there are plenty of things about city life in the future 6. _______ are not certain.

高一英语单词拼写困难题查看答案及解析

No one knows for sure when and where the idea of April Fool’s Day for silly jokes started. One thing is for sure：Humans have been celebrating this holiday for hundreds of years，in many cultures.

One popular theory has to do with the calendar. Many ancient cultures celebrated the new year in spring，around April 1. In Europe，Pope Gregory XIII introduced a new calendar in 1582. The calendar named January 1 as the new start of the year. Many people and countries did not accept the change for years. The story goes that people made fun of the people who still celebrated the new year on April 1.

In some countries，people exchanged gifts on New Year’s Day. So another theory is that people began to give joke gifts on April 1 after the calendar changed. But there are probably as many explanations for the tradition as there are cultures that participate.

One thing is for sure，almost everyone has fun！

Mexicans celebrate a kind of fools’ day on December 28. You’re in trouble on that date if you lend someone something，because you won’t get it back！In India，March 31 is the day for tricks. Portuguese，who celebrate on the Sunday or Monday before the Christian holiday of Lent，throw flour on their friends. People in England say playing tricks after noon on April 1 brings bad luck to the jokers. The U.S. holiday doesn’t have special traditions.

Humor expert Joel Goodman of the Humor Project teaches businesses and individuals how to enjoy the positive power of humor in daily life. When asked to define the difference between a good prank and a disgusting one，he explains，“It is the difference between laughing with someone and laughing at them. Humor should lift people up！”

So start thinking now. If it looks like rain，fill someone’s closed umbrella with pieces of paper and watch them pour down when it is open. Glue a coin to the sidewalk with superglue. When people get annoyed trying to pick it up，remember to yell，“APRIL FOOLS！”Of course，kids can reply with the “Disappearing Class”. When the teacher goes out of the room for a moment，all the kids hide. Just remember，the person you play a trick on should be laughing，too. So keep the tradition going in the right spirit.

1.What is certain about April Fool’s Day？

A. It dated back to 1582.

B. People enjoy this holiday.

C. Its origin is related to a calendar.

D. Pope Gregory XIII created this holiday.

2.Which of the following is a good joke on April Fool’s Day？

A. Skip a class when the teacher is out.

B. Fill someone’s closed umbrella with water.

C. Give someone soap that turns his hands dirty.

D. Frighten someone to death by dressing up as a ghost.

3.The underlined phrase “lift people up”（Paragraph 5）probably means＿＿＿＿.

A. be used in daily lives

B. make people feel happier

C. change people’s attitude

D. be appreciated by people

4.What does the author remind people when they play tricks？

A. Tricks played should be amusing and harmless.

B. The crazier the tricks are，the better.

C. It’s better to use some special tools.

D. Keep playing them for fun.

高一英语阅读理解中等难度题查看答案及解析

. No one knows when exactly the lake _____.

A. took its place   B. came into being     C. happened   D. came over

高一英语单项填空简单题查看答案及解析

No one knows for sure when such a custom first _____.

A. came into power    B. came into being   C. came true         D. came out

高一英语单项填空简单题查看答案及解析

No one knows exactly 1. the earth began, as it happened so long ago. However, according to a 2.(wide) accepted theory, the universe began　 3.a “Big Bang” that threw matter in all directions.

What it was to become was 4. (certain) until between 4.5 and 3.8 billion years ago 5. the dust settled into a solid globe. The earth became so violent 6. it was not clear whether the shape would last or no.

People are 7.(put) too much carbon dioxide into the atmosphere, which prevents heat from 8.(escape) from the earth into space. As a result of this, many scientists believe the earth may become too hot to live on. So9.life will continue on the earth for millions of years to come will depend on whether this problem can be10. (solve).

高一英语短文填空中等难度题查看答案及解析

No one knows exact 　 1.　 the earth began, as it happened so long ago. 　　 2.　 , according to a 　 3.　 (wide) accepted theory, the universe began with a “Big Bang” that threw matter 　　 4.　　 all directions. After that, atoms began to form and combine to create stars and other bodies.

Water 　　 5.　 (appear) on other planets like Mars but, unlike the earth, it had disappeared later. 　　 6. was not immediately obvious that water was to be fundamental to the development of life. What many scientists believe is that the continued 　　 7.　 (present) of water allowed the earth 　　 8.　 (dissolve) harmful gases and acids into the oceans and seas. This produced 　　 9.　 chain reaction, 　　 10.　 made it possible for life to develop.

高一英语语法填空中等难度题查看答案及解析

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

No one knows 　 1.　　 (exact) how the earth began, as it happened so long ago. However, according to a widely 　 2.　 (accept) theory, the universe began 　 3.　 a “Big Bang” that threw matter in all 　　 4.　 (direction). For several billion years after the “Big Bang”, the earth was still just a cloud of dust. 　 5.　 it was to become was 　　 6.　　 (certain) until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. The earth became so 　　 7.　　 (violence) that it was not clear 　　 8.　　 the shape would last or not. It exploded loudly with fire and rock. They were in time 　　 9.　　 (produce) carbon dioxide, nitrogen, water vapour and other gases, which were to make the earth’s atmosphere. What is even more important is that as the earth cooled down, water began to appear on 　　 10.　 surface.

高一英语语法填空中等难度题查看答案及解析

—I’m sure Andrew will win the first prize in the final.

—I think so. He _____ for it for months.

A. is preparing   B. was preparing    C. had been preparing   D. has been preparing

高一英语单项填空简单题查看答案及解析

—I am sure Mary will win the first prize in the final.

—I think so. She______ for it for months.

高一英语单项填空简单题查看答案及解析