A scientist has made another wonderful discovery about human genes,______of great importance to science. A which i think is B which i think it is C which i think it D I think which is 谢谢。
A scientist has made another wonderful discovery about human genes,______of great importance to science. A which i think is B which i think it is C which i think it D I think which is 谢谢。 答：A 译：关于人类基因，有个科学家已经作出了又一项惊人的发现，这我认为对科学是很重要的。 析：非限制性定语从句，加入一个插入语I think而变得复杂。去掉I think,则非常简单。