有一块直角三角形的绿地，量得两直角边长分别为6m，8m，现在要将绿地扩充成等腰三角形，且扩充部分是以8m为直角边的直角三角形，求扩充后等腰三角形绿地的周长。

18．Mary said she didn’t care anything about John, but her red face________.

A．gave her away

B．put her away

C．got her away

D．threw her away