Grammer (multiple choice )

( I am writing , I'll write , I should write ) to you because I ( am not knowing , don't know , know not ) what to do. I' twenty-six and a teacher at a primary school in Egypt where ( I'm working, I've worked , I work ) for the last five years.When I ( was , have been , had been )there for a couple of years,one of the older member of staff ( would leave, left , had been leaving ), and a new teacher ( would be , became , was ) apponted to work in the same department as me . We ( worked,have worked , should work ) together with the same class during her first year and had the ( opportunity of building,possibilities to build, chance to build) up a good profesional relatiponship. Then,about eighteen mobnths after( she has arrived, to have arrived , arriving) in Egypt,she decided to buy( her own,heself, her a) house.She was tired of ( to live,living,ive) in rented accommodation and wanted a place( by her own,of her own,of her self).so after( we'd agreed,we could agree,we agreed with)all the details( what,that,who)neded to be sorted out.