单项选择题

Another hazard was that bottles sometimes fell off the shelves because of ______ from above.

A．vocation
B．vibration
C．ventilation
D．violation
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单项选择题
Some days were better; she would ______ on the sofa and talk dreamily about their taking a trip to Norway together.
A．throw up
B．carve up
C．clear up
D．curl up
单项选择题
He had a reputation for being a bit slow-witted but it didn't ______ him in the least.
A．prevented
B．harness
C．fluctuate
D．perturb
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