___________ should not be allowed to go out at night.
#51486
A
Twelve-years -old
B
Twelve-year-olds
C
Twelve years old
D
Twelve year olds
推荐题目
__________ trees are yellow in autumn.               
#51910
A
The number
B
A number
C
A number of
D
The number of
There are quite a few trees in the forest .
#51490
A
kind of
B
a lot of
C
not too many
D
not enough
_____ the fans are waiting for the popular singer outside the concert hall.
#51873
A
Two thousand
B
Thousands of
C
Two thousands of
D
Two thousand of