Exercise: plurals 4.

1) a break of five minutes

a break

2) a note of fifty pounds

a note

3) a bottle that holds two litres

a bottle

4) a race of thirty kilometres

a race

5) a balloon for four people

a balloon

6) a strike of three days

a strike

7) a fish of three and a half kilos

a fish

8) a meal that costs fifteen dollars

a meal

9) a battery that lasts four hours

a battery

10) a test of ten questions

a test