It may take _________ years to make such robots .        
#51467
A
hundred of
B
two hundreds
C
hundreds of
D
hundred
推荐题目
–How often do you wash your hair? 
#51813
A
One day
B
Twice
C
Twice a week
D
Two times a day
— Mom, I got _______ place in the English Speech Competition?— _______! That's really good news, dear!
#51667
A
the first; Congratulation
B
first; I'm sorry to hear that
C
the first; Congratulations
D
first; What a pity
        people came to the Great Wall during May Day Holiday.  
#51416
A
Million
B
Millions of
C
Million of
D
Ten millions
—What would you like to eat?—       , please.
#51701
A
two piece of breads
B
two breads
C
two pieces of breads
D
two pieces of bread