.So often ______ in recent years that it has almost become a rule. A. has this happened B. this has ...
2023-01-06 22:12:08 60次 河南郑州智林学校2010届高三下学期模拟测试试卷（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
.So often ______ in
recent years that it has almost become a rule.
A. has this happened
B. this has happened
C. is this
happening
D. for this to happen
本题链接：
