【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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根据网考网移动考试中心的统计,该试题:
11%的考友选择了A选项
82%的考友选择了B选项
6%的考友选择了C选项
1%的考友选择了D选项