Do you know something about tree rings? Do you know they can tell us what the weather was like, sometimes even hundreds of years ago?

A tree will grow well in a climate with lots of sunshine and rainfall. And little sunshine or rainfall will limit the growth of trees by studying the tree rings. For example, to find out the weather of ten years ago, count the rings of a tree from the outside to the inside. If the tenth ring is far from the eleventh ring, then we’re sure that it was sunny and rainy most of that year. If it is near to the eleventh ring, then the climate that year was bad.

Tree rings are important not only for studying the history of weather but also for studying the history of man. Many centuries ago, there lived a lot of people at a place in New Mexico. But now you can find only sand there-no trees and no people. What happened?

A scientist studied the rings of dead trees there. He found that the people had to leave because they had cut down all the trees to make fires and buildings. As all the trees had gone, the people there had to move.

1. Tree rings can tell ______ according to the passage.

A. whether a tree was strong or not.

B. whether the climate was good or not

C. how tall trees used to be.

2. If you want to find out the weather of twenty years ago, you should study ________.

A. the twentieth ring

B. the tenth ring

C. the twenty-second ring

3.What does the underline word “limit” mean?

A. 证实 B. 限制 C. 促进

4.Which of the following is NOT TRUE?

A. Trees can’t grow well in a climate with little sunshine and rainfall.

B. Tree rings grow far from each other in a bad climate.

C. The people left the place in New Mexico because the land became sand.

5.The passage mainly tells us ________ .

A. how climate affects the growing of trees

B. the importance of the trees

C Tree rings can help us study the history of weather and man.

Different countries have different kinds of birthday traditions. No matter what they do, they want to express their love, thanks and so on.

Canada: The birthday child is ambushed(伏击)and his /her nose is greased( 在…涂油) with butter or margarine for good luck. The greased nose makes the child too slippery for bad luck to catch him/her.

Denmark: A flag is flown outside a window to show that someone who lives in that house is having a birthday. Presents are placed around the child’s bed while he/she is sleeping so he/she will see them immediately upon awakening.

England: Certain symbolic objects are mixed into the birthday cake as it’s being prepared. If your piece of cake has a coin in it, then you will be rich. Also, when it’s your birthday your friends give you the “bumps”. They lift you in the air by your hands and feet and raise you up and down to the floor, one for each year lived then another one for luck.

South Africa: On the twenty-first birthday , a key made of anything from paper to aluminum foil(铝箔) to silver to gold is presented by the parents as a sign that the child is ready to unlock the door to their future.

United States: A cake is made ,and candles are put on top based on how old the person is. The everyone sings the “Happy Birthday” song, and at the end of the song , the birthday child blows out the candles. If they blow them all out with one blow , their birthday wishes will come true.

1. ______________ in five counties

Country

Things to do

2.___________

Put butter or margarine on the child’s nose for good luck

Denmark:

Put a flag outside a window to show someone is having a birthday.

England

Put a coin into the birthday cake. It means being 3.________

South Africa

On the21st birthday, parents give their children 4.________ to unlock the door to their future.

US

Put certain candles on the cake. If they blow them all out with one blow, the children will 5._______ their birthday wishes.

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