i do not know (come) if she to attend the meeting tomorrow .if she（come）please let me know

I do not know I do not know you do not come from England,do you?----____.I come from America.How do you know that? i do not know (come) if she to attend the meeting tomorrow .if she（come）please let me know 陈述句语序一I do not know when he will come back.二I do not know when will he come back.哪个对? 请问 I DO NOT KNOW sorry,i do not know! Why I do not know i do not know if you _____.if you ____,please call me tonight(come) Did mary come to the party I do not know .she_wh-Did Mary come to the party I do not know .she_while I was out.-I do not know .She _while I was out.A.may have come B must have come C might come D could come为什么不用D I do not know how to do I really do not know if he ( ),if he ( ),please tell me.A .will come,will come B .comes,comes C .will come,comes D .comes,will come I do not know what you I do not know _____ your home. I do not want to know I do not know what you i do not know your write I do not know ! 甚么意思?