16 17
4) Put the verbs in brackets in the passive.
Millions of aspirins
(take) every
year by people all around the world. The drug
(find) in the leaves of the willow
tree. They 18
(discover) to be good
for pain by the Greek doctor Hippocrates in about
400 BC. The pill, aspirin, 19
(develop)
by the German chemist, Felix Hoffman, in 1899.
Nowadays, it 20
(use) for everything
from headaches and flu to stopping heart attacks.
(produce) for the first time
in Egypt in 2,500 BC and the first pair of glasses
(made) in Italy in the thirteenth century.
The idea for contact lenses 23
(think)
of by Leonardo da Vinci in 1508, but the first lenses
(not invent) until 1887. Now,
lenses or glasses 25
(wear) by over
sixty per cent of Americans.
Glass 21
22
24
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