单项选择题

A．expectation
B．security
C．guarantee
D．swear
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单项选择题
A．reasonableB．properC．illegalD．necessary
A．reasonable
B．proper
C．illegal
D．necessary
单项选择题
A．two-threesB．two-thirdC．two-thirdsD．two-three
A．two-threes
B．two-third
C．two-thirds
D．two-three
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