Lady Gaga has put off her concerts because of the difficulties ______ by the ongoing strikes. A．caus...
2022-12-22 17:50:35 32次 2014届山东省莱芜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：
Lady Gaga has put off her concerts because of the
difficulties ______ by the ongoing strikes.
A．causing B．to be caused C．caused D．to cause
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