11.  I think June is the best month in one year.

12.  All the men's money must be handed to he women every month.

13.  I think that June is one of the best month in a year.

14.  I regarded June as one of the best month in a year.

15.  I believe that June is one of the best months in a year.

16.  It was a month since the new term began.

17.  This month is a memorable month.

18.  In this month, we ought to learn from our model --- comrade Lei fen .

19.  There will be a chess match in a month.

20.  In this month, there is a table tennis match in Britain.