Question

complete the text use the past simple or the past continuous tense:
In 1895, physicist Wilhelm Roentgen___________________________(perform) a routine esperiment with cathode rays, when he _________________________ (notice) thet a piece of fluorescent cardboard_______________________ (light up).
He_______________(place)...... of light___________________(pass).....
Roentgen____________(realize) the importance of this discovery and_________(make).....
fico grata.

Answer 1

performed/noticed/lighted uo/placed/passed/realized/maked