单项选择题

They have used every means______to relieve the suffering of the refugees．

A．at their convenience
B．at their will
C．at their request
D．at their disposal
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单项选择题
Whoever enters this country must______with the law，or she he will be punished accordingly．
A．confine
B．consent
C．conform
D．comply
单项选择题
It was no ______that his bike was seen near the site where the fire broke out．
A．incidence
B．coincidence
C．incident
D．coincident
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