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
It is time for me to see ______ dinner.
A．out
B．through
C．about
D．off
单项选择题
The manager of the hotel requests that their guests ______ after 11:00 p. m..
A．not to play loud music
B．shouldn't play loud music
C．don't play loud music
D．couldn't play loud music
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