51.   If you strengthen the muscles in your back you are less likely to have back problems.

52.   Inexperienced managers often have problems with their staff.

53.   It has been claimed that Mr Gooderham May have had financial problems.

54.   It is not just overseas graduate students who have problems.

55.   Jack Johnson, the first black heavyweight champion, had his problems with the law.

56.   John was a really good friend to me when I had all those problems last year.

57.   Keep within the speed limit and you should have no problems.

58.   Laing has never had any problems about getting to grips with long-term strategy.

59.   Language learners often have problems with tenses.

60.   Learners often have problems with pronunciation.