请问这个怎么填?When passing me he pretended ______ me请问为什么填not to have seen 而不填not having seen?谢谢

请问这个怎么填?When passing me he pretended ______ me请问为什么填not to have seen 而不填not having seen?谢谢 请问这个怎么填? Know love,when time passing by；but the lover,will not come back again.请问 Know love，when time passing by；but the lover,will not come back again.怎么翻译， 请问这个空怎么填? 请问这个空怎么填 I saw our math teacher talking with John when I _____ (pass) his office.请问这个地方为什么不填passing而是passed呢? 请问这个空白处怎么填? 请问这个数学表格怎么填 请问这个SHIPPING ORDER怎么填? when I was passing by his room,he was talking with __ teacher.填the other?another?why? passing 请问这个成语怎么填：火（ ）银花 急! 请问大家这个成语怎么填,回答正确给分 请问:烟什么火什么,这个成语怎么填? 英语 请问这个打星号题应怎么填? 请问,这个空怎么填?,夜（ ）日. ge年huang历请问这个怎么填 When I was passing the National Hall,I heard the clock strike twelve.National Hall 怎么翻译