This is Mary speaking.改为同义句忘了说了。要求是4个空的，你们都只有两三个空的，所以不行啊
问题描述：
This is Mary speaking.改为同义句
忘了说了。要求是4个空的，你们都只有两三个空的，所以不行啊
答
This is Mary 打电话用语，意思是我是Mary
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This is Mary talking.
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Mary on the phone..
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I'm Mary.
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This is Mary here.
It is Mary speaking.