单项选择题

We were lost at sea, at the ______ of wind and weather.

A．service
B．expense
C．cost
D．mercy
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单项选择题
I should like to ______ my thanks to you for your kindness.
A．extend
B．intend
C．pretend
D．attend
单项选择题
The girl won't have her lunch before she ______ her homework.
A．will finish
B．finishes
C．had finished
D．finished
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