My aunt has a______son.
#51700
A
four-years old
B
four-year-old
C
fourth-year-old
D
four-years-old
推荐题目
It may take _________ years to make such robots .        
#51467
A
hundred of
B
two hundreds
C
hundreds of
D
hundred
There are fifty students in our class, _____ of us _____ football. 
#51321
A
two third; likes
B
two three; like
C
two thirds; likes
D
two thirds; like
______ of the coats ________ made of cotton. They feel comfortable.
#51105
A
Two-thirds; is
B
Two-thirds; are
C
Two-third; is
D
Two-third; are
Our school has a big library. There are about ten        books in it.
#51557
A
thousand
B
thousands
C
thousand of
D
thousands of