Complete the text with the past simple affirmative, negative or question forms of the verbs in brackets.
LouisPasteur 1822-1895
As a young man, Pasteur studiedat the EcoleNormale in Paris. Then at the age of just 32, he (become)…………….. a professor at the University of Lille. In 1856, Pasteur (receive)…………….. a visit from a man called Bigo who (own)………….. afactory that(make)……………alcohol from sugar beet. He (have) ……………..a question for Pasteur: why (the alcohol/turn/to acid?)……………….? When this (happen ) ………………. , they (not can)…………. use it and (throw)………………it away. Bigo (ask)…………… Pasteur to find out the reason for this. At first, Pasteur (not know) ………………, but when he (examine)………………the alcohol under a microscope, he (find)…………..thousands of tiny micro-organisms. He (believe) ……………….. that they (cause)…………………. the problem (milk, wine and vinegar/behave/in the same way?)………………………………………………….? Other scientists (disagree ) …………………….with him, and newspapers…………….……. (make)…………… fun of him. However, Pasteur (continue) …………………….. With his work, he (invent)……………….. methods of testing his theory and (prove)………………….. that he was right. Later he (work) ………………. Together with two doctors and (develop) ………………… vaccines for diseases such as anthrax and rabies.
