The population of Africa is ________ so rapidly as to cause concern of the whole world.
#71177
A
expanding
B
circulating
C
exporting
D
spreading
推荐题目
_______ is known to the world, the Chinese in many places _______ the old tradition.
#71889
A
That; keep on
B
which; keep out
C
It ; keep back
D
As; keep up
Juliana worked harder to ______ for the time she had lost when she was ill.
#81385
A
keep up
B
catch up
C
make up
D
take up
The scientists are beating their brains, trying to ______ a solution to the problem.
#64469
A
look up to
B
live up to
C
come up with
D
keep up with
________ with many other people, teachers have a relatively stable income.
#69140
A
Compare
B
To compare
C
Comparing
D
Compared