when ____the telephone ______,do you know?-----Yes,In 1876

when ____the telephone ______,do you know?-----Yes,In 1876 A:When was the telephone invented,do you know? --Do you know ______ man in blue?--Yes,he’s a professor of__ do you know he ______ this weekend?-yes,i do. 2.Excuse me,______?Do you know?----yes.I know______. you know when the telephone was invented? Do you know ____the Capital Museum? ----Next Sunday A when w When you do fall in love,do you know 选取：1 Do you know when the telephone----?A was invented B inv what will you do when you ______(know) the way Do you know who-------- ( 发明 ) the telephone? how do you know when it opens and ______(close)