—Do you know who invented Chinese chess?—Sorry. I don’t know

Do you know who invented Chinese chess Who invented Chinese chess?Do you know?合并为含宾语从句的复合句 do you know who the hair band （）?----sorry,i don,t know. 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 I don\'t know I like who~Do you know? --Mary,do you know_________________? .--Sorry, I don’t know -Do you know when he_ the work?-sorry,I don't know ,but I th I don't know who do you think you are和 I don't know who you sorry i don,t know what i can do next sorry i don't know ___ Do you know the way____the post office?Sorry,I don't know,__