Complete the text with the affirmative, negative or question form of the verbs in brackets. Your body b (prevent)
harmful microorganisms entering and causing harm. The skin, for
example, c (allow)
microorganisms to enter. Hairs and mucus in your nose
d (catch)
invaders, and then you
e (push)
the mucus out when you
cough, sneeze or blow your nose. Enzymes and acids in the body, and white blood cells also
f(destroy)
bacteria
g (help)
- antibiotics
? Doctors h (use)
antibiotic drugs to fight inacterial infections, but antibiotics i (work)
against viruses. This is why doctors i (give)
antibiotics to patients with a
common cold or ſu
How k (work)
immunization
.? Immunization
(or vaccination) is another way of protecting the body, by injecting the body with dead or
inactive microorganisms. After vaccination, the body I (start)
to make
antibodies that destroy the microorganism. Because the microorganisms in the vaccination are
not dangerous, the person m (get).
ill. When they
n (come)
into contact with a live (dangerous) micro organism, then the
antibodies o (destroy)
the infection before it makes them ill.
плз,
