问题补充:
Jack took part in the speech contest and, is more surprising, won the first place.
A. that
B. what
C. which
D. it
答案:
A. that
B. what
(答案→)C. which
D. it
解析:这题考查非限制性定语从句,非限制性定语从句也是插入语,去掉后这句话是:Jack took part in the speech contest and won the first place.是个完整的句子,which指代的是won the first place.选C。