单项选择题

He had ______ an emergency operation for a stomach condition, which makes doctors solemnly assured that he was potentially fatal.

A．underlain
B．underlined
C．undergone
D．undertaken
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单项选择题
It's almost eight o'clock. As if______ the bell in the church began to toll for Matins.
A．on trial
B．on view
C．on cue
D．on sale
单项选择题
Mary Robinson has been formally ______ as Ireland's first woman president.
A．sworn in
B．told off
C．spelt out
D．picked up
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