They have made so great progress .
#51890
A
three years ago
B
for three years
C
in the past three years
D
before three years
推荐题目
There are ______________ birds there in the sky.
#51475
A
Million of
B
five millions of
C
millions of
D
five millions
It was too cold and windy , so we could see ____ people walking in the street .
#51786
A
a little
B
little
C
few
D
quite a few
It is reported that _______ people in the world are suffering from the H1N1 flu.
#51225
A
ten thousand of
B
ten thousands
C
thousands of
D
ten thousands of