Question

The weather is changeable. Sometimes it’s very sunny in the morning, but it starts raining in the afternoon, it __1__ be sunny again in the evening. Do you know who changed the weather?

    There are many reasons for it. When the sun __2__, it is day. When the sun sets, it is night. Days are warmer than nights. This is __3__ the sunshine falls on the earth during the day. The sunshine makes the land, the water and the air warm. At night when the sun is not there, it is __4__. In the mornings and in the evenings the sunshine is slanting(斜射). So it is not very hot. At noon the sunshine falls __5__ on the earth, and it is very hot.

    We know that the earth goes __6__ the sun. When one half of the earth is close to (就近) the sun, the other half is __7__ from it. The part of the earth closer to the sun is summer. Here the days are warmer and longer. And the part of the earth away from the sun is winter. Here the days are cooler and __8__. For example, when it’s winter in China, it is summer in Australia.

    People can __9__ the weather, too. We know the temperature on the earth is getting warmer and warmer. This is because the environment has been polluted and destroyed . Now the weather is much worse than before. It’s very terrible. If we want to __10__ our environment, something useful should be done immediately.

(    )1. A. must　　   B. can’t　　       C. may　　        D. should

(    )2. A. rose　　    B. rises　　        C. rising　　       D. sets

(    )3. A. why　　  B. because　　    C. how　　        D. when

(    )4. A. cooler      B. coolest　　      C. hot　　　　     D. hottest

(    )5. A. straight     B. straightly        C. slant　　       D. slanting

(    )6. A. over　　  B. in　　　　      C. round　　      D. below

(    )7. A. off　　   B. wide　　       C. high　　        D. away

(    )8. A. long　　    B. short　　       C. shorter　　     D. longer

(    )9. A. get　　     B. be　　　　     C. become　　    D. change

(    )10. A. improve  B. improves        C. improved        D. improving

 

Answer 1

答案：C;B;B;A;A;C;D;C;D;A
提示：

1．  因为天气是千变万化的, 所以随时可能会有不同的天气变化，故此题选C。 2．  太阳升起预示着白天的开始，故此题选B。 3．  白天比较暖和是由于在白天太阳的光线照射在地球表面上，而That’s because是“那是因为……”的意思，故此题选B。 4．  在夜里，太阳的光线不能照射到地球上，所以天气和白天相比就会较凉，故此题选A。 5．  由于在中午太阳的光线是直射的，而straight 这个词本身就有形容词和副词两种词性，故此题选A。 6．  go round 是一个短语，意思是“围绕……转”，根据这句话的含义，此题选C。 7．  地球是个球体，当它的一面对着太阳，另一面就背着太阳。而be away from 的意思是“远离……”，根据引申义此题选D。 8．  冬天和夏天比较，天气更冷，且白天更短，故此题选C。 9．  除了太阳能改变天气，人类也能改变天气，故此题选D。 10．       人类应及时采取有利措施来提高我们目前的生存环境，故此题选A。