题目内容
18.In ancient times,it wasimpossible (possible) for people to travel in space.分析 在古代,对人们来说去太空旅行是不可能的事情.
解答 答案:impossible.
提示词possible是形容词,意为"可能的",根据所给单词结合语境In ancient times 可以推测句意为"在古代,对人们来说去太空旅行是不可能的事情.",由于设空处单词放在was后面,构成句式:It's+形容词+for sb.+to do,所以应填形容词,再根据句意填提示词的反义词 impossible,故答案为:impossible
点评 本题考查用所给单词的适当形式填空,首先要根据语境明确句意,然后再根据相关语法对所给单词在形式上做出正确的变化.
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