1) I don’t know this man, I never (meet) him before. 2) “Where’s Nick?” – “He just (go) out”. 3) Don’t you know what the story is about? – No, I (not/read) it. 4) Don’t worry about the letter. I already (post) it. 5) I know London perfectly well. I (be) there several times. 6) I can’t find my bag. I think somebody (take) it by mistake. 7) “Do you speak Greek?” – “No, I never (study) it.” 8) “Do you know where he lives?” – “No, he recently (move) to a new flat. I (not/be) there yet”.