-_______ do they go to see their teachers? -Every year. A. How long B. When C. How often D. How much...
2022-10-13 21:15:04 166次 牛津译林版7A Unit 2 Let 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
-_______ do they go to see their teachers? -Every year.
A. How long B. When C. How often D. How much time
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