He studied hard at school when he was young, __________ contributed a lot to his success.
A. which
B. that
C. what
出自：国开英语2

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10245188】个 (题库试题定时更新)