John was so sleepy that he could hardly keep his eyes ______.
#20384
A
open
B
to be opened
C
to open
D
opening
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Mary is _____three sisters.
#20730
A
the nicest of her
B
the nicer of the
C
nicer of her
D
nicer than her
 _____ shouldn’t have part-time jobs because they are too young.
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A
Thirteen years old
B
Thirteen-year-old
C
Thirteen-year-olds
D
Thirteen year olds