单项选择题

We work hard to keep all coffees______, but many of the varieties are difficult to obtain.

A．in store
B．in stock
C．in stack
D．in reserve
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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
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
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