2.55) What are you writting now?
2.56) On whom days do you take English lessons?
2.57) Which day is more convenient for you, Monday or Tuesday?
2.58) Who is your sister? She is a teacher.
2.59) Who knows where Nick lives?
2.60) There are three pencils here which is yours?
2.61) The girl who is talking to me now is my friens.
2.62)The book which on the table is mine.
2.63) There are many pupils whose can speak English fluently.
2.64) Yesterday I met an old friend of mine whom I had not seen for a long time.
2.65) Where is the article which you have translated
2.66) What he said is quite true
2.67) Who came first was unknown
2.68) The problem is what to do
2.69) I don`t know who was here before
2.70) She early became whom she is now