1.   On the first approach, the principal problem with the system is, it is agreed, corruption.

2.   The principal problem about them has generally been said to be that of their meaning or semantics.

3.   The principal technical problems which had to be resolved were breakage due to heavy-duty service and abuse.

4.   There are two principal problems associated with this.

5.   What is the nature of media coverage of fraud, and what are the principal problems of communicating frauds to the public?

6.   The principal problem is understanding the need for particular arrangements.

7.   Notwithstanding this issue, three principal problems have beset the EC budget, especially over the last twenty years.

8.   The principal problem is identified as nitrogen dioxide emissions, most notably from the gas-fired plants.

9.   Forbes and Patrick Buchanan, the commentator, go much further than their rivals in picturing government itself as the principal problem.

10.   Hawks general manager Pete Babcock says the principal problem with the draft is that it has gotten so young.