Fill in: is or are
11. Her advice _____ very interesting.
12. Mathematics_____ his favourite subject.
13. Measles_____ a common illness.
14. The glasses_____ on the table.
15. My sister’s hair_____ long.
16. Their bathroom scales_____ quite accurate.
17. Darts _____ a popular game in Britain.
18. This work_____ too hard.
19. People_____ unhappy with the new tax system.
20. The police_____ near.