l want to know how long_______A.has he been backB.has he come backC.he has been backD.he has come b为什么

我想知道如何算出这道数学题. L want to know how to ___ ___ the Maths problem. l want to know how long you___（have）this bike l don't know what l want to talk about,but l want to talk to l really want to know how many students get up at 6:00.Let's make a s____ about it something l don`t know something l don`t want to know翻译 How to make friut salad.l want to know ,how to make friut salad.ask this question ,use english!thank you all!very short Do you want to know what food l like?OK! Do you want to know what fruits l like?OK! What is matter with you?l want to know! your,day,know,want,to,about,l 连词成句. You know that l want to l a draw know square how 连词成句 to,l,a,draw,know,spuare,how（.） l know how you get to school中文意思是什么? l want to sleep l don't know how l can get to the hospital. l miss you but l don't know how to put it! l want to know how long_______A.has he been backB.has he come backC.he has been backD.he has come b为什么