how old is he?do you know?2并1 do you know how old_______ ___

how old is he?do you know?2并1 do you know how old_______ ___ do you know how old she is How do you know he is depressed? 为什么是Do you know how old he is而不是he is? How do you know? do you know how() how do you know do you know how old is kong ling hui How high is Qmolangma?Do you know?(合并为一句) Do you know ___ __ Then how do you know he is happy? Do you know_?Sorry,Idon't know.A.how old is Tom B.how old To Do you know how to cook?改为同义句Do you know ___ ___ ___ ___?