1.   The smooth surface makes it easier for agents to detect footprints in the road.

2.   Any flat surface will make a good pasting table.

3.   A hot engine can ignite the grass, and soft surfaces make it dangerous to change a tire.

4.   A nonstick surface makes it easier to clean the pans.

5.   He thinks the moister track surface could make a difference, too.

6.   Its glowing metallic surface makes its presence felt a long way off.

7.   Some scientists suggest the featureless spectrum might indicate a surface made of complex carbon-based molecules transformed from methane by billions of years of bombardment by cosmic rays.

8.   The new surface should make a dramatic difference for players.

9.   The researchers said playgrounds needed soft surfaces to make them safer.