Without facts,we can't form a worthwhile opinion,for we need to have factual knowledge upon which to base our thinking.请问在这个句子里,which后的不定式怎么理解?which引导定语从句有这种用法吗?

英语翻译Without facts,we can not form a worth while opinion for we need to have factual knowledge upon which to base our thinking. Without facts,we can not form a worthwhile opinion,for we need to have factual knowledge ____...Without facts,we can not form a worthwhile opinion,for we need to have factual knowledge ____our thinking.A.which to be based on B.upon which to base C.wh Can we live without salt? can we live without salt? Without facts,we can't form a worthwhile opinion for we need to have factuaWithout facts,we can't form a worthwhile opinion forwe need to have factual knowledge upon which to base our thinking.看不懂这这句upon which to base our thinkingbase 以 which to base on 和on which to base区别Without facts,we can’t form a correct opinion,for we need to have actual knowledge ______ our thinking.选第二个为啥?别说第一个是错的 without facts ,we can not form a worthwhile opinion,接上for we need to have factual knowledge ——our thinkingA which to be based onB upon which to baseC which to base uponD to which to be based we can't live without water we can't live without(没有) a____ We can't live without a_________. We can't spell s_ccess without U 英译汉句子From these facts we can draw some conclusions about how the pyramids were bult . Without facts,we can't form a worthwhile opinion,for we need to have factual knowledge upon which to base our thinking.请问在这个句子里,which后的不定式怎么理解?which引导定语从句有这种用法吗? Without facts,we can't form a worthwhile opinion for we need to have factual knowledge( )our(见下方thinkingA.which to be based on B.which to base upon C.upon which to baseD.to which to be based该题正确答案应选C,请解释一下原因, 1.Without facts ,we can’t form a correct opinion ,for we need to have actual knowledge_______ our thinking.A.which to be based on B.which to base onC.on which to base D.which to base2.Man cut down______forests in order to grow crops,or to use _____ 请问这句话的for是所以的意思吗?规定用法?Without facts,we cannot form a valuable opinion,for we need to have factual knowledge until we know the facts we can't do anything about it翻译句子,这里until,用once可以么 from these facts we can draw a conclusion that no one can prevent us from becoming stronger.meaning?