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  • form a worthwhile opinion for we need to have factual knowledge ___ our ...

    form a worthwhile opinion for we need to have factual knowledge ___ our ...
    This sentence is from an exercise book.The whole sentence is:
    Without facts,we cannot form a worthwhile opinion for we need to have factual knowledge ___ our thinking.
    The correct answer of the blank is:on which to base
    The red colour part make me confused.
    I hope somebody could be telling me the structure of the sentence.I can't fully understand such sentences.
    請幫我理解從空處開始向後的這個部分
    英語人氣:953 ℃時間:2020-01-29 12:29:14
    優(yōu)質(zhì)解答
    參考答案:請記得,好朋友的定義是:你混的好,她打心眼里為你開心;你混的不好,她由衷的為你著急.
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