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
—How old is Tom?—He is ____.
#51380
A
fourteen years
B
fourteen year old
C
fourteen old
D
fourteen
—Which number is next to sixteen?—________. 
#51632
A
Twenty
B
Fifteen
C
Thirty
D
Nineteen
There are three ______ students on the playground.
#50978
A
hundred
B
hundreds of
C
hundred of
D
hundreds
_______ of the materials I listened to at the beginning of the exam _______ easy.
#51520
A
three fourths; is
B
third four; are
C
three fourths; are
D
three fourth; are