A better plan was by the headmaster.A. put outB. put awayC. put forwardD. put on

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A. put out
B. put away
(答案→)C. put forward
D. put on
解析：短语辨析. put out 熄灭,伸出、打扰；put away  放好、储存put forward 提出、拿出；put on穿上、上演。根据题意，一个更好的计划被校长提出来了。故选C。