---- What does P．O． ?
----Poster order, I guess．
A. call for
B. fall for
C. prepare for
D. stand for
网友回答
A. call for
B. fall for
C. prepare for
(答案→)D. stand for
解析：考查词组：A. call for要求，需要B. fall for上..的当C. prepare for为…做准备，D. stand for代表，句意：--P.O.代表什么？--我猜是邮编。选D。