1 . That boy is being a real______.

A．insect

B．pest

C．worm

D．bacterium

2 . Each year, tens of thousands of people die because they are infected with antibiotic-resistant _______.

A．balconies

B．bandages

C．bacteria

D．banquets

3 . Eggs, meat, vegetables and other foods can easily be poisoned by microorganisms such as ______.

A．phenomena

B．dilemma

C．diploma

D．bacteria