题目内容
20．阅读短文，根据短文内容和首字母提示写出文中所缺单词．Skin-diving is a new sport today．This sport takes you into a wonderful new world．It is like a （80）visitto the moon．When you are under water，it is easy for you to climb big rocks，because you are no longer heavy．
Here，under water，everything is blue and green．During the day，there is plenty of light．You can catch fish with your hands when they （81）swimnearby．
When you have tanks of air on your back，you can stay in deep water for a long time．You must be （82）carefulwhen you dive in deep water，because it is very dangerous．To catch fish is one of the most interesting parts of this sport．Besides，there are more uses for skin-diving．You can clean ships without taking them out of water．You can get many things （83）fromthe deep sea．
Now you see that skin-diving is both useful and interesting．
分析 这篇短文主要介绍了一种新型的运动--潜泳．并讲述了这种运动的一些特点．
解答 80．visit考查名词的辨析．空格前是冠词，此处应该是名词，结合句意：这就像是去月球的一次旅行．故填visit．
81．swim考查动词的辨析．空格前是主语，此处应该是动词，结合句意：当你在附近游泳时，你可以用手抓鱼．故填swim．
82．careful考查形容词的辨析．空格前是be，此处应该是形容词，结合句意：当你在深水中潜水时，一定要小心，因为它非常危险，故填careful．
83．from考查介词的辨析．结合句意：你可以从深海得到很多东西．from，介词，从，故填from．
点评 做这类题，不但要选择正确意义的词、词组及句型，还要根据具体语法和语境，选择适当的时态、语态及使用正确的词形．
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| 35．A．if | B．because | C．until | D．unless． |
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