单项选择题

Our arrangements were thrown into complete turmoil．（）

A．doubt
B．relief
C．confusion
D．failure

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单项选择题

Lower taxes would spur investment and help economic growth．（）

A．spend
B．require
C．encourage
D．attract

单项选择题

Steep stairs can present a particular hazard to older people．（）

A．danger
B．case
C．picture
D．evidence

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