单项选择题

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
Many people are （） to insect bites, and some even have to go to hospital.

A．insensitive
B．allergic
C．sensible
D．infected
单项选择题
In the present economic （） we can make even greater progress than previously.

A．air
B．mood
C．area
D．climate
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