1). The joke which you told me yesterday was very funny. - шутка - неодушевл. сущ. поэтому берем which
2). I'd like to see a film that is on tonight. - можно было вместо that (в значениикоторый) сказать which
3). The office where my cousin works is ten minutes from the city centre.
4). This boy who plays football very well is Julia's brother.- мальчик - одушевл. сущ. поэтому берем who
5). Dave whose sister has just returned from Great Britain is going to visit us.