“I think i know what it must be to die of that”里面的那个to为什么这样用

what do they think of him?i want to know that(同义转换) i want t 英语翻译I think that it would suck not to know what that feels l 英语翻译Do you know now that I must be going To a place full of the only thing that i can think of for it to be fair is to j What i think it means to be a good person. Darling .I am very happy to be your wife .I think it must be I think it must be的意思 that's one way to think of it,i guess I don't know what I think,to what ( )I know what it is to be in need and what it is to have __ I know that it must be my father.过去式应该是... A to buy it B to be bought C I must buy D must I buy 那个正确