单项选择题

All flights ______ because of the terribly bad weather, the passengers had to wait at the airport.

A．had been cancelled
B．having cancelled
C．having been cancelled
D．were cancelled
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单项选择题
Mr. Brown made up his mind that ______ could he betray his wife.
A．at no circumstances
B．in no circumstances
C．at no circumstance
D．in no circumstance
单项选择题
His career has been an active one: ______
A．writing thrilling novels, editing for TV station and lecture in the State University
B．write thrilling novels, editing for TV station and lecturing in the State University
C．thrilling novel writer, editing for TV station and lecturing in the State University
D．writing thrilling novels, editing for TV station and lecturing in the State University
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