Do you know how long Harbin Subway Line One is

Do you know how ling Harbin Subway Line One is? Do you know how long( )English. how do you know the admission line of graduate test How long is the Changjiang river?Do you know...改为主从复合句.Do yo How do you know you\'ve chosen the one when the life is so f How do you know he is depressed? do you know how old she is 英语翻译I do not know how long you Neng Cheng.And do not know ho --What do you know about ___?--line drawings that show how s How do you know? do you know how() how do you know