单项选择题

My wallet is nowhere to be found; ______ while I was on the bus.

A．should I dropped it
B．I must have dropped it
C．I ought to have dropped it
D．I had been dropping
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单项选择题
What workdays are shared by Arab countries and Western countries
A．Saturday, Sunday, Monday and Tuesday.
B．Monday, Tuesday, Wednesday and Thursday.
C．Tuesday, Wednesday, Thursday and Friday.
D．Wednesday, Thursday, Friday and Saturday.
单项选择题
Which of the following is NOT true according to the passage
A．Usually Arabs may not make prompt decisions.
B．You should act as though you do not hear while a stranger comes in to speak with your host.
C．You should leave angrily because of interruptions.
D．You will have to discuss business in front of strangers.
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