Everyone needs at least eight _________ sleep a night. ——I agree. 
#28564
A
hour
B
hours
C
hour’s
D
hours’
推荐题目
This piano is too big. Can you make ________ for it?
#29146
A
a space
B
some spaces
C
some more rooms
D
some space
TV set is one of       in the world.
#28285
A
most useful invention
B
the most helpful inventions
C
more helpful inventions
D
less useful invention
A carrot is ___________ .
#29596
A
a flower
B
a stem
C
a leaf
D
a root