It is customary for______ to hang up the receiver first.

It is customary for______ to hang up the receiver first.
A、the person answering
B、the person calling
C、the elderly person
D、the youthful person
【正确答案】：BC
【题目解析】：答案选BC。It is customary for the person calling or the elderly person to hang up the receiver first.参见教材P155。