问题补充：
It was on a lonely island he was found alive after the accident.
A. where
B. which
C. what
D. that
答案：
A. where
B. which
C. what
(答案→)D. that
解析：句意:那是在一个孤岛上，在事故后他被发现还活着。这里是强调句型，其结构是：It was+被强调部分+that/who（人）+其他。判断强调句型的方法是把It was that这三个词去掉，整个句子不缺成分，意思完整。
