Escolha a forma verbal ( em negrito) adequada para completar o texto: The year was 1896 and physicist Henri Becquerel wil try/was trying to get fluorescent materials to produce X. rays by being left in the sun. His experiment however, suffered/suffers a week of cloudy, overcast skies. After leaving all of this materials in a drawer he returned / was returning one week later only to find that the uranium rock he left / had left there was managing/had managed to imprint its image on a nearby photographic plate without any exposure to light.