According to the latest research, getting enough sleep is _____to maintaining good health and reducing stress.
#17753
A
practical
B
contradictory
C
essential
D
alternative
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I know you don’t like her, but try not to make it so ______.
#17966
A
curious
B
obvious
C
various
D
previous
–It’s said that we'll have a ________ the coming May Day.  – That’s so good.
#34847
A
three-days holiday
B
three-days' holidays
C
three-day holiday
D
three-days' holiday