people come to visit the Great Wall every year.
#51612
A
Million of
B
Millions of
C
Million
D
Millions
推荐题目
It took him ____ to find the key to the drawer. 
#51068
A
one and half hours
B
one and a half hours
C
one and a half hour
D
one and half hour
It may take _________ years to make such robots .        
#51467
A
hundred of
B
two hundreds
C
hundreds of
D
hundred
_________people attended the meeting last Saturday.
#51608
A
Two hundred of
B
Two hundreds of
C
Two hundred
D
Two hundreds
There were          different kinds of dinosaurs in the word in the past.
#51715
A
hundred of
B
two hundred of
C
hundreds of
D
two hundreds of
There aren’t enough chairs. Would you please _________ ones here?
#51818
A
to bring another three
B
bring more three
C
to take three other
D
bring three more