1.   All fifty name-face pairs were stored in a mathematical model.

2.   Among the five people with yellow-fever IgM antibodies that could not be explained by vaccination, there were two pairs of neighbours.

3.   Between the lamps, just as in a proper home, was a pair of framed photographs.

4.   Caught in the torch beam were a pair of eyes, glittering ebony pupils widening in shock.

5.   He speedily diagnosed a mutual attraction and the pair are now happily together.

6.   In the box was a pair of exquisitely shaped old earrings.

7.   On his feet were a pair of odd socks that were holed at the toes.

8.   The leaves are arranged so that each pair is situated perpendicular to the axis of the preceding leaves.

9.   The pair have been at loggerheads over which of them was more worthy of the player of the century accolade.