选B,without facts ,we can not form a worthwhile opinion,for we need to have factual knowledge upon which to base
our thinking.
后半句的正常语序为:for we need to base
our thinking upon (on)factual knowledge .
选B,without facts ,we can not form a worthwhile opinion,for we need to have factual knowledge upon which to base
our thinking.
后半句的正常语序为:for we need to base
our thinking upon (on)factual knowledge .