Experts have been warning___of the health risks caused by passive smoking. A．at a time B．at one time...
2023-02-07 23:44:06 25次 2007年高考江西卷英语试题 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Experts have been warning___of the health
risks caused by passive smoking.
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A．at a time
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B．at one time
|
|
C．for some time
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D．for the time
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