单项选择题

They ______ the launch of their new company only a year ago.

A． announce
B． are announcing
C． have announced
D． announced
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单项选择题
After re-evaluating the proposal, the agency ______ the contract to us.
A． awarding
B． had awarded
C． awarded
D． awards
单项选择题
There has been a decline in local ______national advertising.
A． therefore
B． so
C． but
D． and
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