Tony is twelve          old, but his sister is only one          old.
#51777
A
year; year
B
years; years
C
years; year
D
year; years
推荐题目
------ How many people were invited to the meeting? ------About six ________. 
#51497
A
hundred
B
hundreds
C
hundred of
D
hundreds of
          people visit the museum  every day.
#51185
A
Million of
B
3 million
C
3 millions
D
3 millions of
I hear ________ students went to the hall to have the concert.
#51440
A
two hundred
B
two hundreds
C
hundred of
D
two hundred of
There is a river around our town. It is about ______ long.
#51858
A
6 hundreds kilometers
B
6 hundred kilometers
C
6 hundreds kilometer
D
6 hundred kilometer