1.   And raising hard money became increasingly difficult as the campaign wore on.

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

3.   As her list grew, it became more difficult to find items to enumerate.

4.   As nationalistic feelings grew, life became increasingly difficult for immigrants.

5.   Beyond the public sector, the cave becomes increasingly difficult, and is accessible only to experts.

6.   Breathing became more difficult as we got higher up the mountain.

7.   But even if you speak many foreign languages, such transactions become difficult for currency reasons.

8.   But it has become difficult to convince those hypochondriacs who also happen to be cat owners that there is no danger.