单项选择题

The new graduate was assigned to __________ the quality of food stuff.

A．manipulate
B．supervise
C．ascertain
D．proclaim
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单项选择题
You should __________ yourself from losing temper at the kid's behavior as be doesn't tell right and wrong.
A．menace
B．refrain
C．bewilder
D．simulate
单项选择题
Sometimes even the most tamed animals would attack us _________.
A．unexpectedly
B．subsequently
C．reluctantly
D．deliberately
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