问题补充：
Science has told us so much about the moon that it is quite easy to form an idea of what it would be like to go there. It is certainly not a friendly place. As there is no air or water, there can be no life of any kind. Mile after mile there are only plains(平原) of dust with mountains around them. Above, the sun and stars shine in the black sky. If you step out of the mountains shadows, it will mean moving from terrible cold into great heat. The moon is also a very silent(安静的) world, for sound waves (声波)can only travel through air. But from the moon, you can see a friendly sight(景色). Our earth is shining more brightly than the stars. It looks like a large ball, coloured blue and green and brown.
16.What kind of place is the moon?
A. It is a friendly place. B. It is a lively place.
C. It is a nice place for man to live. D. It is a lifeless place.
17.Temperatures on the moon.
A. are usually the same everywhereB. Are always very low
C. can be very different D. are usually very high
18.The moon is a silent world because.
A. there is no life there B. there is no air there
C. there is no water there D. there is not a green tree there
19. When we look from the moon, the sky is .
blue B. black C. green D. brown
20. Mile after mile there are only plains of dust with mountains around them. The word “dust” means “”.
A. dump (垃圾堆) B. dry earth (泥土) C. land D. field16-20 DCBBB
答案：
(答案→)16-20 DCBBB
解析：
1.从文章的句子：As there is no air or water, there can be no life of any kind.可知月球上没有生命。选D。
2.从文章的句子：If you step out of the mountains shadows, it will mean moving from terrible cold into great heat.可知月球上的温度很不一样。选C。
3.从文章的句子;The moon is also a very silent(安静的) world, for sound waves (声波)can only travel through air.可知是月球上没有空气。选B。
4.从文章的句子;Above, the sun and stars shine in the black sky.可知答案是B。
5.从所在的句子看，dust是泥土的意思。选B
