How amazing it is that astronauats are exploring outer space

问题描述：

How amazing it is that astronauats are exploring outer space It is a challenge( )man agast nature
A of B for C by D about 为什么不用B 对人来说不行吗?
为什么B不行！
1个回答 分类：英语 2014-11-26

问题解答：

我来补答
How amazing it is that astronauants are exploring outer space !It is a challenge ( )man against nature.
A of B for C by D about
答案：A
解析：a challenge of ……
……样的挑战
 
 
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