1.  I should have kept practicing all the way.

2.  We have been keeping on listening to others and keeping on trying to make sense of them.

3.  Along with the economic reform and developed countries' great thirst for intellectuals, the flow of Chinese students abroad has kept an increase tendency since late twentieth century.

4.  Mr Robert has kept it for sixty years.

5.  One man had kept talking the whole evening in a gathering while his wife sat beside him, saying nothing.

6.  As my classmate in junior high school, Juan has kept me company six years, 3 of which we were segregated because I should meet my further study's need.

7.  Some expenses had kept almost uncharged during the 10 years.

8.  She has kept her dream of becoming a surgeon since she was in the primary school.

9.  Nonetheless, at the same time we'd better keep a balance between your major field and other branches.

10.  Since then, the number has been kept steady, which now fluctuates between 3, 000 and 4, 000.