What the doctor really doubts is ______ my mother will recover from the serious disease soon. A．when...
2022-12-18 01:36:56 77次 2014届黑龙江省高二下学期第一次检测英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
What the doctor really doubts is ______ my mother will
recover from the serious disease soon.
A．when B．how C．whether D．if
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