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【单选题】
At the international conference, the famous scientist gave an excellent report ______ on his recent experiment.
A.basing
B.based
C.to be based
D.to base
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根据网考网考试中心的答案统计,该试题:
16%的考友选择了A选项76%的考友选择了B选项2%的考友选择了C选项6%的考友选择了D选项