1.  Failure to do this is the only reason for a reversal of the spin from one direction to another.

2.  His only reason for investing in the company was to take it over.

3.  Such idealism is not the only reason why methods of alternative dispute resolution are supported.

4.  That is the only reason I agreed to write this message to you.

5.  The catty rumor was that the only reason Oseary got his job was that he was her boyfriend.

6.  The extra income is not the only reason.

7.  The frequency-dependence in the advantage of unrestrained fighting is probably not the only reason why natural fighting is restrained.

8.  The only reason Carla Married Henry was because she was pregnant.

9.  The only reason for defining abuse is to ensure that incidents are identified and reduced by good professional and managerial practice.

10.  The only reason I ever kept on that bloody flat was for Dandy to have somewhere to come back to.