he has made a discovery,_______ of great importance to the p
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he has made a discovery,_______ of great importance to the progress of science and technology.
A.which I think is B.that I think is C.I think which is D.of which I think it is
并且 分析一下其他选项!
A.which I think is B.that I think is C.I think which is D.of which I think it is
并且 分析一下其他选项!
A,因为这个是非限制性定语从句,那么引导词肯定要放在前面了,所以肯定是which在前,排除C,而且非限制性定语从句,引导词不能用that,排除B,然后就看A和D,这个定语从句的先行词是discovery,放到从句里就是I think the discovery is of great importance,根本不需要有it,所以选A,这个句子的意思是他的发明对科学技术的进步很重要.
he has made a discovery,_______ of great importance to the p
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