His ability has never been in doubt----the question is ___________ or not he is prepared to work har...
2022-12-22 23:55:13 27次 2014届上海市高二上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
His ability has never been in doubt----the question is
___________ or not he is prepared to work hard.
A．that B．if C．where D．whether
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