(Texto bem simples com muitos exemplos de voz passiva; subline todos e tente passar para a voz ativa)
Scientific American
Cancer Fight Takes Another Step Forward The drug, known as Avastin, has been shown to prolong the lives of those with advanced colon cancer. It works by starving cancerous tumours of blood, a process known anti-angiogenesis, thus preventing them from growing in the body. Unlike chemotherapy, which works by killing all dividing cells, this new drug will target only the cancerous tumours themselves. The backing of the new treatment is being seen as a potentially very significant breakthrough in the fight against cancer. The drug has been shown to prevent the formation of new blood vessels, thereby denying tumours the oxygen and other nutrients needed for their growth. In approving it, the FDA described it as the first drug that had been proven to delay tumour growth.
1:35 am PST, 27 February 2004
The Federal Drug Administration has approved drug which that aims to treat cancer in a new way.