11.   I wear contact lenses usually, but I have a pair of glasses which are now about seven years old.

12.   We have two pairs of tickets to see the show at the Empire.

13.   And we have two pairs of tickets to give away.

14.   Why did you know I had a pair of aces?

15.   You should have a pair.

16.   Did he have a pair of tickets?

17.   Andy Sheets, filling in at third base for the injured Russ Davis, had a pair of run-scoring singles.

18.   Are there, in real life, people who daydream about sex for hire with somebody who has a pair of perfect SATs?

19.   At least someone would have a pair.

20.   Aveline, a top Paris dealer, has two pairs of signed Valadier candelabra that were made as centerpieces for the tables of the nobility.