34. (单选题) Zhong Nanshan made another wonderful discovery, _____ of great value to study SARS.(本题1.0分) A、 which I think is B、 which I think it is C、 I think it is D、 I think is

34. (单选题) Zhong Nanshan made another wonderful discovery, _____ of great value to study SARS.(本题1.0分)
A、 which I think is
B、 which I think it is
C、 I think it is
D、 I think is

出自：河北建筑工程学院-大学英语2（高起专）

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