:___ trees around the house on the south and west sides,they can save up to about $250 a year on cooling and heating. A. Having planted B. To have planted C. Being planted D. To have planted

___ trees around the house on the south and west sides,they can save up to about $250 a year on cooling and heating.

A. Having planted 
B. To have planted
C. Being planted 
D. To have planted

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Chọn A

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