单项选择题

As the director can't come to the reception, I'm representing the company __________.

A．on his account
B．on his behalf
C．for his part
D．in his interest
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单项选择题
You must let me have the annual report without __________ by ten o'clock tomorrow morning.
A．failure
B．hesitation
C．trouble
D．fail
单项选择题
While he was in Beijing, he spent all his time __________ some important museums and buildings.
A．visiting
B．traveling
C．watching
D．touring
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