He has made another wonderful discovery,___ of great importance to science.A．who
题型：不详难度：来源：
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 |
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答案
| D |
解析
| 首先去掉插入语I think，使选项明朗化；因前后都是两个无连词的句子，可判断后句为非限制性定语从句。 |
举一反三
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