Exercise 3 .
Complete each sentences with an appropriate word.
a A deaf person is a person who cannot hear.
b A blind person is a person who cannot see.
c the white is our organ of hearing . d our organ
of sight is the retina.
e when you
are short-sighted you need to wear glasses to see in the distance
f you can
have a little operation to correct your vision
Exercise
4.Put the verbs in the parentheses into the correct tenses to complete the text
.
In 1967, a
South African doctor, Christian Barnard, performed the first human heart transplant. He and his surgical team took the heart of a 25-year-old woman killed in a car accident and pot in the body of a 55-year-old man. the patient survived for 18 days. Over the next 10-15 years doctors made important medical advances, but many heart transplant patients died. Nowadays the operation haved good success rate. Doctors did approximately
3,500 heart transplants a year, and at the moment researchers worked to perfect a mechanical heart. and what of the future ? Technology improved all the time.Do we will be able to perform brian transplants one day?
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