题目列表(包括答案和解析)
He gave us another piece of advice, ________ of great help to the research work.
A.which I think is | B.which I think it is |
C.I think which is | D.I think it is |
He gave us another piece of advice, ________ of great help to the research work.
A.which I think is B.which I think it is
C.I think which is D.I think it is
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