He used to visit his parents _____, but he is too busy to call on them now. A every second weeks B e...
2023-01-11 19:03:01 148次 北京市20092010学年高一下学期期中考试试题（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He used to visit his parents _____, but he
is too busy to call on them now.
A every second
weeks B every two weeks
C every a few
weeks D every two week
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