Do you know_ （how serious the problem was）?A,when did the story happenB.how long the meeting lasted C,that if there are any mistakesD,how serious the problem was请告诉我B、C错在哪里,应怎么改》谢谢!

Do you know_?Sorry,Idon't know.A.how old is Tom B.how old Tom is C.where Tom live 11.who is that man over there? Do you know_ name? A,he B,his C,him帮忙选下 Do you know_ （how serious the problem was）?A,when did the story happenB.how long the meeting lasted C,that if there are any mistakesD,how serious the problem was请告诉我B、C错在哪里,应怎么改》谢谢! How do you do? How Do You Do? how do you do? how do you do How do you do how do you do How do you do how to do it和how to do区别The girl didnt know_.So she went to ask the manager for help空格应该填how to do it,还是how to do? i lost my friend's bike and i really don't know_ a.what to do b.how to do 个人认为选b答案是什么求解 I do not know how to get to the hospital 改宾语从句 I do not know_ _ _get to the hospital How do you you birds in many tree the how you se can How do you spell how do you like . how do you