_________ should not be allowed to go out at night. 
#51907
A
Twelve-years-old
B
Twelve-year-olds
C
Twelveyearold
D
Twelveyearsolds
推荐题目
__________ trees are yellow in autumn.               
#51910
A
The number
B
A number
C
A number of
D
The number of
________ of giant pandas is getting _________ because their living areas are becoming farmland.
#51692
A
The number, larger and larger
B
A number, larger and larger
C
The number, smaller and smaller
D
A number, smaller and smaller
--How many birds can you see in the tree? --I can see    birds in the tree.      
#51676
A
hundred of
B
hundreds of
C
five hundreds
D
five hundreds of
The big flood last week affected(影响) ________ people’s lives, and _______ them died.
#51435
A
thousands of; two hundred
B
thousands of; two hundred of
C
two thousand; two hundred
D
two thousands; two hundreds