Some scientists think that it may take ______ years to make robots look like people, and do the same things as us.
#51234
A
hundreds of
B
two hundreds of
C
two hundreds
D
hundreds
推荐题目
By the first day of August, 2007, the PLA has its ______ birthday.
#51372
A
eighty
B
the eightieth
C
eightieth
D
eighties
We often plant _______trees every year.
#51640
A
thousand
B
thousand of
C
thousands of
D
thousands
There was _______terrible earthquake in 2011 in Japan! It killed _______ people.
#51562
A
/, thousands of
B
/, thousand
C
a, thousands of
D
a, thousands