they did not know which end was

they did not know which end was they did not know which was better是什么意思 The little boy did not know ____.A.which hat was his B.which They did not agree with the idea which was put forward at th they did not know the way very well. first ,i did not know who she was They planted some trees which did not need much water中的which They were also quite sure that a cigarette end did not start Many young people end up in a job that/which they are not in there were many christmas cards (),but i did not know which She did not leave here,do not know why?Perhaps I was touched his leg was hurt ,-----is why he did not come.A it B which C