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

Are the days  56 in summer or in winter? In China the days  57  longer in summer. There are  58 than sixteen  59 of daylight in the middle  60  summer. In  61 there ate only about eight hours of  62.  When is the weather warmest in China? It is the  63 during the summer months. During the winter it is often very 64.  In spring and autumn the weather is usually neither very hot nor very cold. The south has a  65 summer. The north has a cold winter.

1.A. longer   B. longest   C. long

2. A. is    B. am    C. are

3.A. many   B. much    C. more

4. A.days   B. hours  C. years

5. A. of    B. on   C. at

6.A. spring   B. winter   C. summer

7. A. day   B. light   C. daylight

8.A. warm   B. warmest   C. warmer

9. A. wet   B. hot    C. cold

10. A. cold   B. rain    C. hot

Are the days  56 in summer or in winter? In China the days  57  longer in summer. There are  58 than sixteen  59 of daylight in the middle  60  summer. In  61 there are only about eight hours of  62.  When is the weather warmest in China? It is the  63 during the summer months. During the winter it is often very 64.  In spring and autumn the weather is usually neither very hot nor very cold. The south has a  65 summer. The north has a cold winter.
【小题1】A. longer   B. longest   C. long
【小题2】 A. is    B. am    C. are
【小题3】A. many   B. much    C. more
【小题4】 A.days   B. hours  C. years
【小题5】 A. of    B. on   C. at
【小题6】A. spring   B. winter   C. summer
【小题7】 A. day   B. light   C. daylight
【小题8】A. warm   B. warmest   C. warmer
【小题9】 A. wet   B. hot    C. cold
【小题10】 A. cold   B. rain    C. hot