we woll not know ?scientists are right until the daywe land on Mars.请问这个宾语从句应该用那一个,what,whether,that,which

we woll not know ?scientists are right until the daywe land on Mars.请问这个宾语从句应该用那一个,what,whether,that,which BUT for their help,we ___the program in time.A.can not finish B.woll not finish C.had not finished D.could not have finished 该选哪一个 为什么 （选与不选的原因都说一下） What we know is not much.What we do not know is immense. we know not what is good until we have lost We know what we are,but know not what we maybe. We do not know when we shall give a fashion show.同义句we do not know()()()()()() What we know is nothing; what we do not know is immense中文是什么意思? We know not what is good until we know have lost it!中文意思是什么? We don not know when (finish) the work .如何填 I do not know that we have no how we know what is not so翻译 改病句we are not know his name I don't know ()we will go or not. why do you add me we do not know us we would rather that they______about it!A.not to know B.didn't know C.not knowingD.don't know if we do not know something very well,we help each other.sif we do not know something very well,we help each other.请问：very well we can learn what we did not know we can learn what did we not know请问,这两句话语法对不对,求指教 单选from time to time we must look up words___A.the meaning of which we do not knowB.whose meaning we are not familiarC.we do not know their meaningsD.whose meanings we do not know