春运期间，一务工女在高铁西站候车室进站安检后，忙乱中将装有1万元现金及其他物品的手提箱遗落在传送带末端，甲见状遂提一只相同的空手提箱将务工女遗落的手提箱互换，被便衣民警当场抓获，甲的行为涉嫌构成（　）。

A.盗窃罪

B.侵占罪

C.抢劫罪

D.偷盗罪

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.