A．The operation of the new fax machine.
B．The advantage of the new technology.
C．The information released through the mail system.
D．The necessity of setting up access code.

A．Life is always miserable．
B．Some'rest will cheer the woman up．
C．It's no use complaining.
D．He'll try hard to help

A．Because he was praised by the professor．
B．Because he has found a good job.
C．Because he has got a chance for an interview.
D．Because he has made a good investment.