A) complete the sentences using past simple or present perfect. example: they in a new project. (to take part / last year)- they took part in a new project last year. 1)the scientist his article.(to write \ already)- 2)andrew's hamster his food,(to eat \ just)- 3) the boys an old cage in their garden. (to find \ yesterday)- 4) they the problem. (not \ discuss \ yet )- 5) charles his translation. (to finish \ just )-