It may take _________ years to make such robots .        
#51467
A
hundred of
B
two hundreds
C
hundreds of
D
hundred
推荐题目
          of the coats           made of cotton. They feel comfortable.
#51498
A
Two-thirds; is
B
Two-thirds; are
C
Two-third; is
D
Two –third; are
Nowadays            of business letters are written in English.? 
#51708
A
two-third
B
two-thirds
C
two-three
D
two-threes
His father served in the army in ________ when he was in ________.
#51731
A
the 1950s; his twenties
B
1950s; twenties
C
1950’s, the twentieth
D
the 1950s; the twentieth
There are ________ people in the supermarket. It’s so crowded.
#51898
A
hundred
B
hundreds
C
hundred of
D
hundreds of