If green the door might look more beautiful.A. paintB. paintedC. to paintD. painting

问题补充：

If green, the door might look more beautiful.

A. paint

B. painted

C. to paint

D. painting

答案：

A. paint

(答案→)B. painted

C. to paint

D. painting

解析：主语是door, 因此用过去分词表示被动。