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题目内容
（河南工学院大学英语）
Without facts, we cannot form a worthwhile opinion, for we need to have factual knowledge _____ our thinking(本题1.0分)
A、 which to base on
B、 which to be based on
C、 to which to be based on
D、 upon which to base
A、 which to base on
B、 which to be based on
C、 to which to be based on
D、 upon which to base
参考答案