问题描述：
填入所缺英语单词：One always had to guess what he was s____
补充
1、But he just could not u_____
2、I always remember to teach my students by s_____ them the right ways to do things.
补充
1、But he just could not u_____
2、I always remember to teach my students by s_____ them the right ways to do things.
问题解答：
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