Complete the sentences either using past simple or present perfect.
a) From 1945 to 1950 we ___________ (live) on 96th street.
b) William ___________ (study) French in Paris many years ago.
c) The First World War ____________ (begin) in 1914.
d) Mrs. Smith _____________ (be) our teacher since January.
E) John is in the ho0spital. He ________ (be) there for three weeks.