题目内容
The teacher seldom let an opportunity to teach his students or to help them make up for the days of schooling they had missed ____.
A. pass B. passing C. to pass D. being passed
A
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题目内容
The teacher seldom let an opportunity to teach his students or to help them make up for the days of schooling they had missed ____.
A. pass B. passing C. to pass D. being passed
A