His ___ (curious) about the earth led him to a great discovery.
问题描述：
His ___ (curious) about the earth led him to a great discovery.
括号中的词变为适当的形式填入空白处,略作说明,顺便翻译一下句子.谢谢!
答
填curious的名词形式：curiosity
他对地球的兴趣把他引向了一个伟大的发现.