英语翻译A:Where is my pen?Mum,do you know?B:Sorry,I don't know.I

Do you know where Niagara ______(fall)is?Sorry,I don't know A:excuse+me,where is the hospitl?B:I'm sorry,I don't know.I’ Do you know where Mike is now?Sorry,I don't konw,__ Is can't find my pen .Where is it?Do you know?Sorry,I_______ Do you know--------last night?Sorry,I don't know Do you know ___?-Sorry I don't know. -Do you know ___?-Sorry,I don't know 选择：Is the bike____or____?--------Sorry,I don't know.A：my,you A:Do you know ( )the population of China( B:Sorry,I don't kn A; Do you ______Jack B;Sorry ,I don"t know him Mum,do you know where ____ of my shoes is I just find ____ u I don't know ().Can you tell me?A.where do we meet B.when ar