已知M=4x²-12xy+10y²+4y+9，那么当x=______，y=______时，M的值最小，M的最小值为______．

— Attention, please. The plane has to be ______ because of the heavy rain. 

— Oh, bad luck! We have to wait now. [ ]

A. put on

B. put off

C. put up

D. put away