【单选题】
Johan's score on the test is the highest in the group; he ______ last night.
A.should have studied
B.must have studied
C.has studied
D.should study
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根据网考网移动考试中心的统计,该试题:
25%的考友选择了A选项
61%的考友选择了B选项
6%的考友选择了C选项
8%的考友选择了D选项