摘要： (1) The professor has written another book, of great importance to computer science. (2) The professor has written another book, of great importance to computer science. A. which I think it is B. and I think it is C. which I think is D. when I think is
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The professor has written another book ____ of great importance to computer science.
A. which I think it is B. and I think is
C. which I think is D. when I think is
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