甲见候车室的椅子上坐着一女子和一男子，他们面前放着一手提箱，男子在睡觉，女子在看报。甲以为手提箱是该男子的，遂提一只相同的手提箱走上前去,将手提箱互换,被女子发现。手提箱实际上是该女子的，她一直在紧盯着这只箱子。箱内财物计人民币4000元。甲的行为构成何罪？
A.盗窃罪B.诈骗罪C.抢夺罪D.侵占罪
共用题干
Mind Those Manners on the Subway
So,there you are,just sitting there in the subway car,enjoying that book you just bought ______(46) Or , the person sitting next to you takes out a nail clipper（指甲刀）and begins cutting his or her nails.
Annoying? Many of us have to spend some time every day on public transportation.
______(47)So,to make the trip more pleasant,we suggest the following:
Let passengers get off the bus or subway car before you can get on.______(48)
Stand away from the doors when they are closing.
Don't talk loudly on a bus or subway.Chatting loudly with your friends can be annoying to others.______(49)
Don't think your bags and suitcases（手提箱）deserve a seat of their own.
Use a tissue whenever you cough or sneeze（打喷嚏）.An uncovered sneeze can spread germs （细菌）, especially in crowded places.
Don't cut your nails or pick your nose on public transportation. Don't read over other people's shoulder.______(50)It can make people uncomfortable.They might think you're too stingy （小气的）even to buy a newspaper. Or they might think you're judging their behavior.
______(49)
A: Don't eat food in your car.
B: Don't shout into your mobile phone on a bus or subway.
C: We all know that some behaviors are simply unacceptable.
D: Many people do this on subways,but it's really annoying.
E: Getting off and on in an orderly manner can save time for all.
F: Suddenly,you feel someone leaning over your shoulder reading along with you.
