What a pity is you didn’t arrive by daylight.
A. there, because
B. it, that
C. it, when
D. that ,for
网友回答
A. there, because
(答案→)B. it, that
C. it, when
D. that ,for
解析：考查主语从句。本题中的it是形式主语，真正的主语是后面的that you didn’t arrive by daylight；连接词that在句中不充当任何成分，只起连接和引导的作用。句意：你白天没有来真是一件遗憾的事情啊！故B正确。