单项选择题

Although ______ primarily to promote trade relations, these agreements also foster technological cooperation.

A．designed
B．they are to be designed
C．it is designed
D．they are being designed

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单项选择题

______ our general agent, you would also have to look after the advertising.

A．Be
B．For
C．To be
D．As

单项选择题

I have received ______ professional training.

A．three-month
B．three-months
C．a three-month
D．three-month’s

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