No one really knows exactly of when the first...

No one really knows exactly of when the first people arrived in　　　　 we now know as California

A．where B．when　　　　 C． what D．which

高一英语单项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（不多于3个单词）或括号内单词的正确形式。

　 1.　 (exact) when the first people arrived in what we now know as California，no one really knows. However, 2. is likely that Native Americans were living in California at least fifteen thousand years ago.

Scientists believe that these first settler 3. (cross) the Bering Strait in the Arctic to America 4.　 means of a land bridge which existed in prehistoric times. In the 16th century, after the 5. (arrive) of Europeans, the native people suffered greatly. Thousands were killed or forced into slavery. In addition, many died 6. the diseases brought by Europeans. However, some survived these terrible times, and today there are more Native Americans 7. (live) in California than in any other state.

In the 18th century, California was ruled by Spain. Spanish soldiers first arrived in South America in the early 16th century. Two centuries later, the Spanish had settled in most parts of South America and along the northwest coast of 　 8. we now call the United States. Of 9. first Spanish to go to California, the majority were religious men, whose ministry was 10. 　 (teach) the Catholic religion to the natives.

高一英语语法填空中等难度题查看答案及解析

Almost every machine with moving parts has wheels, yet no one knows exactly when the first wheel was invented or what it was used for. We do know, however, that they existed over 5,500 years ago in ancient Asia.

The oldest known transport wheel was discovered in 2002 in Slovenia. It is over 5,100 years old. Evidence suggests that wheels for transport didn't become popular for a while, though. This could be because animals did a perfectly good job of carrying farming tools and humans around.

But it could also be because of a difficult situation. While wheels need to roll on smooth surfaces（光滑表面）, roads with smooth surfaces weren't going to be built until there was plenty of demand for them. Finally, road surfaces did become smoother, but this difficult situation appeared again a few centuries later. There had been no important changes in wheel and vehicle design before the arrival of moden road design.

In the mid-1700s, a Frenchman came up with a new design of road—a base layer (层) of large stones covered with a thin layer of smaller stones. A Scotsman improved on this design in the 1820s and a strong, lasting road surface became a reality. At around the same lime, metal hubs (the central part of a wheel) came into being, followed by the pneumatic tyre(充气轮胎) in 1846. Alloy(合金) wheels were invented in 1967, sixty years after the appearance of tarmacked roads (柏油路). As wheel design took off, vehicles got faster and faster.

1. What might explain why transport wheels didn't become popular for some time?

A. Few knew how to use transport wheels.

B. Humans carried farming tools just as well.

C. Animals were a good means of transport.

D. The existence（存在）of transport wheels was not known.

2.How is the last paragraph mainly developed?

A. By giving examples.

B. By making comparisons.

C. By giving discussion

D. By making classifications.(分类)

3.What is the passage mainly about?

A. The beginning of road design.

B. The development of transport wheels.

C. The history of public transport.

D. His invention of fast-moving vehicles.

高一英语阅读理解简单题查看答案及解析

. 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 exactly ______ this important discovery was made.

A. that　　        B. that how 　　    C. what 　　            D. when

高一英语单项填空简单题查看答案及解析

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

When this new kind of virus broke out at first in Mexico, no one had the least idea that it would _______ so rapidly throughout the world.

A. export　　　　 B. spread　　　　　　　　 C. expand　　　　　　 D. deliver

高一英语单项填空中等难度题查看答案及解析

Throughout history, people have been interested in knowing how language first began, but no one knows exactly where or how this happened. However, we do know a lot about languages, the languages of today and also the languages of earlier times. There are probably about three thousand languages in the world today. Chinese is the language with the most speakers. English, Russian and Spanish are also spoken by many millions of people. On the other hand, some languages in the world have less than one hundred speakers.

There are several important families of languages in the world. For example, most of the languages of Europe are in one large family called Indo-European. The original (最初的) language of this family was spoken about 4,500 years ago. Many of the present day languages of Europe and India are modern forms of the language of 4,500 years ago.

Languages are always changing. The English of today is very different from the English of 500 years ago. In time some even die out completely. About 1,000 years ago English was a little -known relative of German spoken on one of the borders（边界）of Europe.

If a language has a lot of speakers or if it is very old, there may be differences in the way it is spoken in different areas. That is, the language may have several dialects. Chinese is a good example of dialect differences. Chinese has been spoken for thousands of years by many millions of speakers. The differences between the dialects of Chinese are so great that speakers of Chinese from some parts of China cannot understand speakers from other parts.

1.The first paragraph mainly tells us that_______.

2.Many European and Indian languages ______.

3.____ seems to have changed a lot

4. The best title of this passage is ________ .

高一英语阅读理解中等难度题查看答案及解析

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