【单选题】
If she refuses to answer your phone calls, just ______ calling until she does answer.
A.insist in
B.persist in
C.to insist on
D.to persist on
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根据网考网移动考试中心的统计,该试题:
44%的考友选择了A选项
53%的考友选择了B选项
2%的考友选择了C选项
1%的考友选择了D选项