21.  In my opinion, I think the two-days weekend is good, it can help me to finish the homework and the housework, it can give me to have a rest, it can make me do a lot of things .

22.  later I have finished the running.

23.  Now, their practice has finished, they will be away .

24.  Professor Hunter was very excited that morning because he had just finished the papers of his invention.

25.  A few minutes later, I finished the experiment.

26.  Fortunately, I finished all the experiment at last.

27.  After finished a letter to Ann, she went on to write Jane .

28.  On weekends, I usually finish homework at first, and then do some exercises about all the subjects which I study at school.

29.  And I can play football with my friends when I have finished my home work.

30.  Having been finished those intense match, we were full of zest to talk about that.