After several years of observation, the research group ______ the conclusion that language acquisition is faster when students ______ to the situation where it is spoken.

It will be many years ______the doctors and medical scientists can find _____ for cancer.

We have to ______ everything question in detail ______ we take action.

A. conclude; before   B. make analysis of; when  C. expose; until  D. analyze; before

 It is clear that no use can be made ______radium _____we don’t know clearly the characteristics of it.

 From my point of view, the theory that ______ by the scientist is not quite scientific.

The invention of steam engine greatly sped up the industrial revolution, which _____ a lot to the take-off of the world.

 以Nature为题写一篇100词左右的英语短文。要点如下：

1. 简述人类对大自然的依赖。

2. 随着人类的发展，生态平衡遭到破坏，人类生存的环境受到严重污染。人类正在受到大自然的惩罚。

3. 我们要善待自然，自然也会关照我们。

注意：内容可适当增减，但不可逐字翻译。

Nature

此题要求改正所给短文中的错误。对标有题号的每一行做出判断：如无错误，在该行右边横线上划上一个（P）；如有错误（每行只有一个错误），则按下列情况改正：

此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。

此行缺一个词：在缺词处加一漏字符号（Λ），在该行右边横线上写出该加的词。

此行错一个词：在错的词下面划一横线，在该行右边横线上写出改正后的词。

注意：原行没有错的不要改。

　　Last Saturday, I wanted very much to see a film

together with my brother after supper. On my way           51. _____

to the cinema, we happen to meet an American              52. _____

named Peter, who had lost his way, looked worried.          53. _____

When he told us that he wasn't able to find                 54. _____

the hotel, we decided take him there. When we went         55. _____

to the hotel, we told of Peter the great changes              56. _____

that had taken place in our country in the past few year,       57. _____   

and he told us a lot of things about the youths in the U.S.A.

Although my brother and I missed a interesting          58. _____

film, we felt very happily, for we had not only helped        59. _____

Peter out of trouble and also learnt something from him.      60. _____

Language is always changing. In a society where life continues year after year with few changes, the language does not change either. The earliest known languages had difficult grammar but a small, limited vocabulary. Over the century, the grammar changed, and the vocabulary grew. For example, the English and Spanish people who came to America during the sixteenth century gave names to all the new plants and animals they found. In this way, hundreds of new words were introduced into English and Spanish vocabularies. Today life is changing very fast, and language is changing fast too.

There are several major(主要) language families in the world. Some scientists say there are nine main families, but other scientists divide them differently. The languages in each family are connected, and scientists think that they came from the same parent language. About 3 percent of the people in the world speak languages that are not in these major families.

1.The early language had ________.

2.In the next few hundred years we can expect language to _____.

3.What this article shows is that _____.

In Canada you can find dogs，cats，horses，etc. in almost every family. These are their pets. People love these pets and have them as their good friends. Before they keep them in their houses，they take them to animal hospitals to give them injections（注射）so that they won’t carry disease. They have special animal food stores， though they can get animal food in almost every kind of store. Some people spend around two hundred Canadian dollars a month on animal food. When you visit people’s houses，they would be very glad to show you their pets and they are very proud of them. You will also find that almost every family has a bird feeder in their garden. All kinds of birds are welcomed to come and have a good meal. They are free to come and go and nobody is allowed to kill any animal in Canada. They have a law against killing wild animals. If you killed an animal，you would be punished. If an animal happened to get run over by a car，people would be very sad about it.

People in Canada have many reasons to like animals. One of them might be：Their family ties are not as close as ours. When children grow up，they leave their parents and start their own life. Then the old will feel lonely. But pets can solve this problem. They can be good friends and never leave them alone.

1.The passage mainly talks about ＿＿＿＿＿＿＿＿ .

2.In Canada，children leave their parents when they grow up because ＿＿＿.

3.Which of the following is TRUE？