1.  I keep putting it in there, clean one.

2.  Another policy adopted in much of Western Europe, Australia and Canada is to allow exchange of used needles for clean ones.

3.  As far as dirty tricks go, there are clean ones and dirty ones.

4.  Aside from his refusal to trade his sweat-stained hat for a clean one, Wetteland made flicking sunflower seeds for distance and accuracy a science.

5.  A clean one, though.

6.  But remember, a dirty filter is more efficient than a clean one because it will stop more dust and other particles.

7.  C. Pick it up and let your host or waiter know you need a clean one.

8.  Critics contend that exchanging dirty needles for clean ones only makes it easier for addicts to continue using drugs and for people to try drugs for the first time.

9.  First, experts say, be sure to use clean ones.

10.  I should have smelled this one clean to Denmark.