16-year-old students in England should understand fifteen _______ words.
#51588
A
thousand
B
thousands
C
thousand of
D
thousands of
推荐题目
There are nine______ students at Green High School. Five _____ of them walk to school.
#51580
A
hundred, hundred
B
hundreds, hundreds
C
hundreds of, hundred
D
hundred of, hundreds
–How often do you wash your hair? 
#51813
A
One day
B
Twice
C
Twice a week
D
Two times a day