Tourism, _______ it brings in money to a country, can also result in damage to the World Heritage si...
2022-10-30 18:27:41 206次 2014-2015学年山东济宁市高三4月质量检测英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Tourism, _______ it brings in money to a country, can also result in damage to the World Heritage sites there．
A．once B．while C．if D．as
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