11.   The technique has never been used before and, if necessary, will be attempted again tomorrow.

12.   F G B, yes, the same as the shortened form we used before.

13.   Analysts usually go along with the companies, and use income before special charges in their research reports and earnings estimates.

14.   And Zimmer continued to run variations of an advertisement he has used before.

15.   Assess what your lawn keeper might use before heading to the lawn-equipment retailer.

16.   Baking powder needs to be used before the pull date or the results will be decidedly flat.

17.   Before Mercury he used to jog five miles a day.

18.   Before you use this, sand off as much rust as possible.

19.   Before you use an herbal remedy for a particular condition, learn all you can about it from the most reliable sources you can find.

20.   Biochemical assay techniques had been used before to identify animal meat residues in cooking pots at archaeological sites.