单项选择题

An attempt to rescue the American ______ ended in disaster when a helicopter crashed.

A．captives
B．hostages
C．convicts
D．hosts
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单项选择题
I had to cancel our lunch date, as it ______ with my hospital appointment.
A．coincided
B．consisted
C．coexisted
D．restrained
单项选择题
Her lipstick left a red mark on the ______ of the cup.
A．rig
B．rap
C．rim
D．rip
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