71.  Another great way to warm up is to save the more difficult documents for last.

72.  Arthritis can make movement not only painful but very difficult.

73.  Arthritis made it difficult for him to do everyday things like take out the garbage or mow the lawn.

74.  Artists are terribly difficult people for us ordinary mortals to deal with.

75.  As a result it is much more difficult for toads to extract water from clay.

76.  As a result it is often difficult to analyse the errors of a probabilistic system in an effort to improve its performance.

77.  As an important by-product it will also make it difficult for prospective bidders to build up stakes in secret.

78.  As chief executive, I often have to take difficult Decisions.

79.  As demands crowd in on you it becomes increasingly difficult to keep things in perspective.