31.  These can be very helpful in cases where lack of muscle tone is the main reason for incontinence.

32.  This is the main reason politicians have few close relationships of any kind.

33.  What is your main reason for choosing one restaurant over another?

34.  My main reason for subscribing to New Scientist is to keep abreast of advances in science.

35.  Stress is a main reason for debt.

36.  The main reason, however, was the reallocation of oil supplies for use in the Soviet Union or for export for much-needed hard currency.

37.  He cited a lack of funds as the main reason for his decision.

38.  This was perhaps the main single reason why changes in teaching methods were not implemented.

39.  The main reason was again inflation.

40.  The final section is the expedition, the main reason why people do the award scheme.