1.   All objects have a propensity to move in straight lines, upwards or downwards, towards their natural place.

2.   Along comes another machine which sweeps all the nuts into nice straight lines between the avenues of almond trees.

3.   Always travelling in the same direction - a straight line.

4.   As long as he moved in a straight line at a uniform speed, he felt a wonderful sense of buoyancy.

5.   Can you walk in a straight line?

6.   Draw a straight line across the top of the page.

7.   Everybody stand against the wall in a straight line.

8.   First, draw two straight lines across the page using a ruler.