单项选择题

Not content to ______ along in ignorance and on her own, Patty began reading everything she could get and immediately set out to develop a network of gardening colleagues.

A．fumble
B．mumble
C．rumble
D．tumble
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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
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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