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
It may take _________ years to make such robots .        
#51467
A
hundred of
B
two hundreds
C
hundreds of
D
hundred
______ of the floor _______ wet.
#51522
A
Three quarter;is
B
Three fourths; is
C
Three fourth;are
D
Three quarters; are
— Is your e-friend in Year_____?— No. He is in the_____Grade.
#51471
A
Eight; Ninth
B
Eighth; Ninth
C
Eight; Nine
D
Eighth; Nine