成人高等教育 / 专科英语
正确率：100%
_ _ _ _ _ _ _ _ _ _ , the knowledge economy has become the major characteristic (特征) of the national economy of most developed countries.
- A、
From time to time
- B、
Once in a while
- C、
For the time being
- D、
Once upon a time
参考答案：
佳题速递：