题目

根据句意及首字母提示补全单词 （1） --I'm going to play football this Saturday. What's your p? --I'm going to have a piano lesson. （2） The invention of Concorde was a huge s     forward in airplane history. （3） Don't walk a        the street until the traffic stops. （4） The plane will t        off in ten minutes. 答案： 【1】plan step across take

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