单项选择题

Although customers keep complaining about their poor service, they've made no ______ to make any improvement.

A．action '
B．trial
C．attempt
D．progress
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单项选择题
Those who receive your invitation only two or three days before the actual wedding day have good reason to feel that they are not highly ______.
A．expected
B．regarded
C．worshipped
D．admired
单项选择题
All individuals are required to ______ to the laws made by their governments.
A．obey
B．conform
C．concede
D．' observe
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