Helen is 15 years old, and Joan is 15, too. So Helen is ____ Joan. 
#44942
A
as big as
B
as older as
C
as old as
D
so old as
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He is a _____ boy, so he can’t go to the park by himself.
#45765
A
six-year-old
B
six year old
C
six-years-old
D
six years old
 Mary is _________ primary school student in Beijing.
#45266
A
a 8-year-old
B
an 8-year-old
C
a 8-years-old
D
an 8-years-old
 ________ ,  I know it doesn’t matter.   
#45256
A
Later
B
Late
C
Later on
D
late on
If you want to be ___________, please keep ____________ every day.
#46411
A
healthy, happy
B
health, happily
C
healthy, happily
D
health, happy