A suspended

B suppressed

C summoned

D subjected

26. The money I got from teaching on the side was a useful ____ to my ordinary income.

A profit

B supplement

C subsidy

D replacement

27. Chinese people are now enjoying better dental health, as shown by the declining ____ of tooth decay.

A treatment

B incidence

C consequence

D misfortune

28. Many countries have conversation programs to prevent certain ____ of fish from becoming extinct.

A species

B sources

C numbers

D members

29. Susan never took any cookery courses; she learned cooking by ____ useful tips from TV cookery programs.

A picking up

B bringing up

C putting up

D pulling up

30. The President _____ his deputy to act for him while he was abroad.

A promoted

B substituted

C authorized

D displaced