单项选择题

Passengers should ______ for flight BA125 to Berlin.

A．check in
B．check off
C．check up
D．check out
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单项选择题
Which of the following is not mentioned as a problem for employers that is potentially solved by telecommuting
A．Employee's lateness of work.
B．Employee's absence from work.
C．Employee's need for time alone to work intensively.
D．Employee's conflicts with second jobs.
单项选择题
Which of the following does the author mention as a possible disadvantage of telecommuting
A．Small children can't understand the boundaries of work and play.
B．Computer technology is not advanced enough to meet the needs of every situation.
C．Technological troubles can destroy the program.
D．The worker often does not have all the needed resources at home.
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