单选题
He has made another wonderful discovery, ______ of great importance to science.
A、
who I think it
B、
which I think it is
C、
that I think is
D、
which I think is
【正确答案】
D
【答案解析】
[解析] 句意：他有了另一项伟大的发现，我认为这对科学有着重大的意义。此从句为非限制性定语从句，修饰主句，所以用关系代词which，排除A、C。其在从句中充当主语，所以it在从句中多余，故答案为D。
提交答案
关闭