问题
选择题
Many experts have raised doubts about ____ it is right to judge teachers' performance on students' test scores. [ ]
A. that
B. what
C. whether
D. if
答案
答案：C
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Many experts have raised doubts about ____ it is right to judge teachers' performance on students' test scores. [ ]
A. that
B. what
C. whether
D. if
答案：C