people came to the Great Wall during May Day Holiday.  
#51416
A
Million
B
Millions of
C
Million of
D
Ten millions
推荐题目
There are more than three      people in the city.
#51395
A
millions
B
million
C
millions of
D
million of
We have ____ books in our school library.
#51312
A
Hundred of
B
hundreds of
C
a hundreds of
D
ten hundreds of
This is the      time during      days that he has made the same mistakes. 
#51052
A
second; third
B
two; three
C
two; third
D
second; three