I'm 13 years old and my sister is 15 years old. So my sister is
#51712
A
one
B
two
C
three
D
four
推荐题目
Two             students in our school will go to the beach.
#51625
A
hundred
B
hundreds
C
hundreds of
D
hundred of
– Your father looks tired! -- Yes, he worked for _________ after twelve o’clock. 
#51838
A
two more hours
B
two another hour
C
more two hours
D
another two hour
The doctor had to work for ___after twelve o'clock.
#51570
A
two more hours
B
two another hour
C
more two hours
D
another two hour
There are ________ people in the supermarket. It’s so crowded.
#51898
A
hundred
B
hundreds
C
hundred of
D
hundreds of