单项选择题

A lot of people could fall iii after drinking contaminated water.

A．boiled
B．polluted
C．mixed
D．sweetened
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You have to be patient if you want to sustain your position.
A．maintain
B．better
C．acquire
D．support
单项选择题
He endured great pain before he finally expired.
A．fired
B．resigned
C．died
D．retreated
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