61.Why can we still see during the day when the sky is cloudy？

　 　A. Because we can see all day and all night.

　　 B. Because the sun can't give us light all day long.

　　 C. Because the sunlight can shine through the clouds.

　　 D. Because we can't see at night.

60.What are the two main things the sun gives us？

　　 A. Light and heat. 　　B. Heat and eggs.　C. Corn and light. D. Wheat and bread.

59.Which words tell us what the sun is like？

　　 A. Huge.(大的)　　 　B. Hot.　 　　　C. Bright. 　　　D. All above.

58. Stamp collectors have paid ＄16， 800 for ________.

A. fourteen One Penny Orange-Reds　　 B. twelve Two Penny Blues

C. one One Penny Orange-Red　　　　 D. one Two Penny Blue

　B

WHY IS THE SUN　 IMPORTANT？

　The sun is a huge, hot, bright star. It is important because without it there would be no life on Earth. The sun gives us light and heat.

All living things need light and heat from the sun to live. Plants need light and heat to grow. They use the light from the sun to make food. We cannot make our own food, but plants can. All the food we eat comes from plants in a food chain(链)which starts with the sun. For example,

　Animals need sunlight, too. Just like us, their food comes from a food chain which begins with the sun and the plants.

　sun→ leaf→ caterpillar(毛虫)→bird

　sun→ seaweed(海藻)→small fish→ whale(鲸)

　Sunlight means we can see during the day. If there was no sun, it would be dark all the time. Even when the sky is cloudy, the sunlight is very strong and it shines through the clouds.

57. The mistake on the stamps was made ________.

A .in Mauritius　　　　 　　　　　　B. at Mauritius Government House

C. in a post office　　 　　　　　　　D. in London

56.Over a century ago, Mauritius ________.

A. was an independent country　　　 　B. belonged to India

C. was one of the British colonies 　　　D. was a small island in the Pacific Ocean

54. A. felt　　　　　　　　　　　　 B. realized　　　　　　　 C. enjoyed　　　　　　　　　 D. told

53. A. forgot　　　　　　　　　　 B. recognized　　　　　 C. considered　　　　　　　 D. regretted

52. A. ugly　　　　　　　　　　　 B. lasting (持久的)　 C. serious　　　　　　　　　 D. frightening