There are about more than five ___________  "left-behind" students (留守学生) in China.
#51593
A
million
B
millions
C
million of
D
millions of
推荐题目
 ___________ 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
There are_______ seasons in a year. Winter is_________season.
#51527
A
fourth; the fourth
B
fourth; four
C
four;the fourth
D
four;the four
May I ask you __________questions? 
#51799
A
any
B
some
C
much
D
little
 On National Day there are more than five __________ people in the zoo.
#51602
A
thousand
B
thousands
C
thousands of
D
thousand of