问几道英语单选题
1.Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge_____our thinking.
A.upon which to base B.which to be based on
C.which to base on D.to which to be based on
2.So far,he_____in remembering 2000 English words.
A.has succeeded B.succeeds C.succeeded D.is succeeding
3.—I heard that Mary won the prize of the math contest.
—_____She was not interested in it at all.
AYou're kidding!B.So what?C.Why not?D.Not really.
麻烦高手咯.写明理由.