In March 1964, Alaska began to shake. There was a great earthquake. It was the biggest earthquake the country ever had.

Shops and houses fell down. One street dropped 30 feet. One island rose about meters into the air. Parts of the sea bottom became dry land. People felt the earthquake hundreds of kilometers away.

Each year there are many earthquakes. Most of them are small. They happen in different parts of the world. We are not sure what makes them. But if you are near, you can see the earth move. you may see a big crack(裂缝) in the ground. Sometimes the land drops on one side of the crack. It goes up on the other side of the crack. There is a new hill. The old world has a new shape.

1.The strongest earthquake in Alaska happened in_____.

A. April 1967 B. March 1964 C. June 1864 D. May 1867

2.From this story we can see_____.

A. most people are afraid of earthquakes B. the bottom of the sea is nearly dry

C. people are trying to stop earthquakes D. earthquakes often do a lot of harm

3.From the story we know earthquakes happen_____.

A. in shops and other buildings B. in different parts of the world

C. in small countries D. only in big cities

4.The story wants to tell us____.

A. earthquakes change the land B. houses fall down and streets are broken

C. Alaska shakes a lot D. how the strongest earthquake happened

5.The word “earthquake” in the story means_____.

A. a sudden dropping of the island B. the making of a new hill

C. a strong shaking or moving of the ground D. the rising and falling of the sea bottom

The word“day” has two meanings. When we talk about the number of days in a year, we are using “day” to mean 24 hours. But when we talk about day and night, we are using“day” to mean the time between sunrise and sunset. Since the earth looks like a ball, the sun can shine on only half of it at a time. Always one half of the earth is having day and the other half night. A place is moved from day into night and from night into day over and over by the spinning(旋转)of the earth. At the equator(赤道)day and night are sometimes the same length(长度). They are each twelve hours long. The sun rises at 6 o’clock in the morning and sets at 6 o’clock in the evening. For six months the North Pole is tilted(倾斜)toward the sun. In those months the Northern Hemisphere(半球)gets more hours of sunlight than the Southern Hemisphere. Days are longer than nights. South of the equator nights are longer than days. For the other six months the North Pole is tilted away from the sun. Then the Southern Hemisphere gets more sunlight. Days are longer than nights. North of the equator nights are longer than days. Winter is the season of long nights. Summer is the season of long days.

1.When the Western Hemisphere is having day, the Eastern Hemisphere is having ________.

A. both day and night B. day

C. neither day nor night D. night

2.A place is moved from day into night and from night into day over and over by ________ of the earth.

A. the pushing B. the pulling C. the spinning D. the passing

3..At the equator day is as long as night ________.

A. sometimes B. never C. usually D. always

4.When the North Pole is tilted toward the sun, the Northern Hemisphere gets ________ sunlight.

A. less B. more C. all D. no

5..When it is winter in China, ________.

A. the USA is tilted toward the sun

B. the South Pole is tilted away from the sun

C. the North Pole is tilted toward the sun

D. the North Pole is tilted away from the sun

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