1.  As a rule, we eat too many simple carbohydrates and not enough complex ones.

2.  Interest rates and government spending are connected, but the relationship is quite a complex one.

3.  Simple sentences are more likely to be grammatically correct than long complex ones.

4.  The life of Brian is often portrayed as a complex one.

5.  Other highly complex ones have been developed by the preservation of various pre-existing instincts.

6.  Woodley concludes that the relationship between age and performance is a complex one which needs further analysis.

7.  Clerks obtained their know-how by an apprenticeship system in which school-leavers learned on the job, beginning with low-level tasks and graduating to more complex ones.

8.  The process by which a individual becomes politically socialized is a complex one.

9.  But the subject of pensions is an extremely complex one and even for the more modestly paid individual, there are many factors to take into account.

10.  Although the problem is a complex one, it essentially boils down to lousy writing.