摘要:as, which 非限定性定语从句 由as, which 引导的非限定性定语从句.as和which可代整个主句.相当于and this或and that.As一般放在句首.which在句中.例如: As we know, smoking is harmful to one's health. 如我们所知.吸烟有害健康. The sun heats the earth, which is very important to us. 太阳使地球暖起来.这对我们人类很重要. as 和which在引导非限制性定语从句时.这两个关系代词都指主句所表达的整个意思.且在定语从句中都可以作主语和宾语.但不同之处主要有两点: (1)as 引导的定语从句可置于句首.而which不可. (2) as 代表前面的整个主句并在从句中作主语时.从句中的谓语必须是系动词,若为行为动词.则从句中的关系代词只能用which..

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You speak, write a letter, make a telephone. Your words carry a message. People communicate with words. Do you think you can communicate without words? A smile on your face shows you are happy or friendly. Tears in your eyes tell others that you are sad.
When you put up your hands in class, the teacher knows you want to say something or ask questions. You shake your head, and people know you are saying "No". You nod and people know you are saying "Yes". Other things can also carry messages. For example, a sign at the bus helps you to know which bus to take. A sign on the door helps you where to go in or out. Have you ever thought that there are a lot of signs around you and that you receive messages from them all the time? People can communicate in many other ways. An artist can use his drawing to tell beautiful mountains, about the blue sea and many other things. Books are written to tell about all the wonderful things in the world and also about people and their ideas. Books, magazines, TV, radio and films all help us communicate with others. They can help us to know what is going on in the world and what other people are thinking about.
【小题1】People communicate ________.

A.with words only B.in many different ways
C.in letters and drawings D.with smiles, tears and hands
【小题2】Signs can carry as many _________ as words.
A.questions B.examples C.tears and smiles D.messages
【小题3】Which of the following is not talked in the passage as which can help us communicate?
A.books and magazines B.TV and filmsC.newspapers D.radio
【小题4】Communication is important because it can help people to ______.
A.understand the world and other people better around us.
B.teach each other to speak, write, read and draw.
C.know what other people are thinking about
D.learn about mountains,blue sea and other things.
【小题5】The best title(题目)for this short passage is _________.
A.Signs Carry Messages B.The important Communication
C.Words, Signs and Drawing D.Ways of Communication.

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Whether we’re 2 years old or 62, our reasons for lying are mostly the same: to get out of trouble, for personal gain and to make ourselves look better in the eyes of others. But a growing body of research is raising questions about how a child’s lie is different from an adult’s lie, and how the way we deceive changes as we grow.
“Parents and teachers who catch their children lying should not be alarmed. Their children are not going to turn out to be abnormal liars,” says Dr. Lee, a professor at the University of Toronto and director of the Institute of Child Study. He has spent the last 15 years studying how lying changes as kids get older, why some people lie more than others as well as which factors can reduce lying. The fact that children tell lies is a sign that they have reached a new developmental stage. Dr. Lee conducted a series of studies in which they bring children into a lab with hidden cameras. Children and young adults aged 2 to 17 are likely to lie while being told not to look at a toy, which is put behind the child’s back. Whether or not the child takes a secret look is caught on tape.
For young kids, the desire to cheat is big and 90% take a secret look in these experiments. When the test-giver returns to the room, the child is asked if he or she looked secretly. At age 2, about a quarter of children will lie and say they didn’t. By 3, half of kids will lie, and by 4, that figure is 90%, studies show.
Researchers have found that it’s kids with better understanding abilities who lie more. That’s because to lie you also have to keep the truth in mind, which includes many brain processes, such as combining several sources of information and faking that information. The ability to lie — and lie successfully  — is thought to be related to development of brain regions that allow so called “executive functioning”, or higher order thinking and reasoning abilities. Kids who perform better on tests that involve executive functioning also lie more.
【小题1】What’s the purpose of children telling lies?

A.To help their friends out.
B.To get rid of trouble.
C.To get attention from others.
D.To create a popular image.
【小题2】The underlined word “deceive” in Paragraph 1 can be replaced by “      ”.
A.tell liesB.handle troubles
C.raise questions D.do research
【小题3】From the second paragraph we can know that       .
A.which factors can reduce lying
B.why some lie more than others
C.it is normal for kids to tell lies
D.how lying changes as kids grow
【小题4】It can be inferred from the passage that        .
A.children’s lies are the same as adults’
B.the better kids are, the more they lie
C.the older kids are, the more they lie
D.kids always keep the truth in their mind
【小题5】What is NOT included in the passage?
A.The reasons why kids tell lies.
B.Which kind of kids tells more lies.
C.Experiments about lying of young kids.
D.What to do with lying children.

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