单项选择题
It was two years ago ______ she went to teach in the mountains, and we have never seen her since then.
单项选择题 Dr. Seaman would prefer the matter ______ at the next meeting.
单项选择题 When I was a child, I ______ for a swim, if the weather was fine.
单项选择题 The more you give, ______ you obtain.
