—Do you have Mary's address?
—Sorry, I don't have it ______ me at present.
A:to
B:on
C:for
D:from
如图,有一正方形池塘,在它的四角A、B、C、D处有四棵大树,现要把池塘的面积扩大一倍,但是,这四棵树不能移动,也不能使它们淹在水中,而且扩大后的池塘还是正方形,试作图说明该怎么办?