write guestions for the sentences.example: ann jones is the secretary of

Write guestions for the sentences.example: ann jones is the secretary of mr wooding(what...?)-what does ann jones do?
1.mr golovin got an invitation letter yesterday.(what...?)
2. mr wooding will phone mr golovin tomorrow.(when...?)
3.a group of 20 Russian student can come to london.(how many...?)
4.barbara grey is responsible for the social programme.(why...?)
5.mr golovin thanked his english colleague for the invitationamp;(who...?)