2. A. correctly　　 B. slowly

　 C. quickly　　　 D. directly

1. A. separated　 B. appeared　　 C. worked　　 D. started

1．根据句意推断。2．ways方法。3．1ackn．缺少。解决寒冷和食物短缺的办法。4．dorp vt. 使……落下。5．rest此处作“越冬”解。A项不符，树木不是死了。6．根据下文Hibernation... 可知。7．be known as称为，被认为是。8．prepare for为……作6. 准备，固定短语。9．store up储存。10．在夏季和秋季。11．从or take it into...可捧除；hide，意思相同。12．dmp此处为不及物动词，意为“下降”。13，close紧密的；loose松散的，与句童不符。14．fall into a deep sle印酣睡，进入一种沉睡的状态。15．Mr 1ess投有生命的；dying垂死的，与句意不符。17．about指“到处”。18．根据句意推断。再找一个好的地方。19．awnke苏醒过来。20．一个冬天不吃东西，耗尽脂肪，一定是thin。

36

It was July 1976. An unmanned spaceship, Viking One, had arrived at Mars.

On July 20th, the spaceship　 1　 . Part of it continued toward a landing on the planet. It fell　 2　 through the late afternoon Mars’ sky.

Forty kilometers above the planet, the thin　 3　 began to slow its fall. Six kilome-ters above the planet, a big parachute opened. The landing craft fell more slowly. Then, three rocket engines　 4　 . And the landing craft set down　 5　 on the surface. A 　　6　 in the Viking One Lander immediately sent a message to the earth. It said, “I am here. I am down safely. I am beginning my work.”

The message　 7　 at the speed of light. It took twenty minutes to reach the earth, more than three hundred twenty million kilometers 　8　 . Scientists and engineers at the control center　　 9　　 .

Moments later, television receivers in the control center began to 　　10　　 　the first pictures from Viking One. People at the center could see the feet of the landing craft sit-ting firmly on the　 11　 soil of Mars. Those pictures were our first　 12　 look at the planet. They showed a red surface, full of rocks, with no sign of　 13　 . It was our first look at a planet that is full of surprises, mysteries, and promise.

Viking One was launched toward Mars in August, 1975. The spaceship had two 　14　 : an orbiter and a lander. The orbiter would circle　 15　 Mars. It would take pictures of Mars’ surface. It would　 16　 the atmosphere.

The　 17　 would go down to the surface. It would carry　 18　 to dig up and study soil and 　　19　 　. It also would report about any evidence of life on the planet. The lander would send this　 20　 to the orbiter and then back to the earth.

20. A. fat　 B. strong　 C. thin　　 D. active

Key: 1-5 CBADD　 6-10DCCAA　 11-15 BBBCA　 16-20 DABDC

解析：

19. A. get hungry　 　B. feel hot　

　 C. sleep　　　 　　D. awake

18. A. after　 B. before　 C. when　 D. while

17. A. about　　 B. for　 C. in　　　 D. to

16. A. need　　 B. will 　C. must　 　D. may

15. A. lifeless　　 B. dying　

　 C. useless　　 D. safe

14. A. drop 　B. take　 　C. fall　　 D. stay