It is not until the disease has progressed to AIDS ____a person begins to look sick. A．who B．that C．...
2022-12-22 06:33:48 144次 2014届海南琼海嘉积中学高二上教学质量监测（三）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：
It is not until the disease has progressed to AIDS
____a person begins to look sick.
A．who B．that C．where D．before
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