题目内容:
Without facts, we can’t form worthwhile opinions, forwe need to have factual knowledge our thinking.
A.Which to be based upon A.Which to be based upon
B. upon which to base
B. upon which to base
C. which to base upon
C. which to base upon
D. upon which to be based
D. upon which to be based
参考答案:
答案解析: