1.   Dan found biology difficult, and physics harder still.

2.   And harder still is succeeding with your first major studio movie in America after a thoroughly unconventional British independent release.

3.   Even without widespread public support, the Maya fighters will prove hard to defeat in their rain forest, harder still to dislodge or cajole.

4.   Harder still has been not racing.

5.   Harder still is to adapt the way in which Japanese middle managers are trained.

6.   Harder still after the daughter died, leaving granddaughter Corinne motherless.

7.   Harder still, for some, to dream of a rosy future.

8.   Harder still, for the Americans, Valderrama is familiar to the other side as the site of the past eight Volvo Masters.

9.   It was harder still for her to imagine that the party would crush people favoring reasonable reforms.

10.   It is harder still to take a subject treated with amusement by political writers from International Falls to Washington and make it fresh.