1 2 Complete the text with the correct form of the verbs in brackets (passive voice). (5)
Aspirin
These days, aspirin
(use) to treat a variety of aches and pains. Its
medicinal properties 2
(know) for over three thousand years. Even
Hippocrates, the Ancient Greek who 3
(often refer) to as the father of
medicine', knew about it. Indeed, historians believe that aspirin
(prescribe) for headaches long before Hippocrates' time. However, it
(not manufacture) in its present tablet form until the end of the 19th century when a scientist working
for the drugs company Bayer synthesised aspirin for the first time.
4