how old is the Great Wall?

how old is the Great Wall? “How old is the Great Wall”这句话是什么意思? Great wall,old,is,how,the 连词成句 请帮我回答这个问题：1.How old is the Great Wall? How long is the Great Wall How long is the Great Wall?It's about( )( ) ( ) how long is the great wall?怎么回答 改正下列英文句子How old is your sister?How old is Great Wall?It’s be Is the Great Wall short? This is the Great Wall. where is the great wall? ( )The great wall is about_____long.