问题：
You should get down to your study from now on.Please________what is of great importance for
your future development.
[ ]
A. concentrate on
B. depend on
C. put on
D. take on
You should get down to your study from now on.Please________what is of great importance for
your future development.
B. depend on
C. put on
D. take on
your future development.
[ ]
A. concentrate on B. depend on
C. put on
D. take on
参考答案：