(1) Pardon? / I beg your pardon.
(2) Sorry, I can't follow you.
(3) Can you speak more slowly, please?
(4 )How do you say...in English.'?
(5) I don't know how to say that in English.
(6) I don't know the word in English.
(7) How do you spell it, please?
(8) I'm sorry I only know a little English.
(9) Could you repeat that, please? Could you say that
(10) What do you mean by killing time?