At the meeting, student representatives some very good suggestions.
A. put out B. put off C. put forward D. put down
17. being fun and good exercise，swimming is a very useful skill．
A．Apart from B．As good as C．In addition D．As well
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解析：考查短语辨析。根据意思，除了有趣和很好地锻炼，游泳还是个有用的技巧。C项也是“除了”，但需要加to.