11.   The city has a big problem with drugs.

12.   They can also cause big problems for coastal fisheries, aquaculture operations and the tourist industry.

13.   Two other big problems facing the organisers are crowd and traffic control.

14.   The point is that people grew unaccustomed to thinking and acting in a responsible and independent way.

15.   Herein lies another big problem.

16.   Another big problem encountered by most youngsters is how sick they feel about being away from home.

17.   Germany does have a big problem.

18.   The big problem was the forwards.

19.   Discarded rubbish and noise are also a big problem.

20.   Is it a big technical problem or is it very straight forward.