It was the middle of the night __ my father woke me up and told me to watch the football game

It was the middle of the night __ my father woke me up and told me to watch the football game .A. that B. as C. which D. when
为什么这里要when不用that，用that不是一样可以当做强调句型来理解吗？the middle of the night 直接做状语不行吗？求高手解答

本句中的when引导的是一个时间状语从句。
句义：当我的父亲把我叫醒并我告诉我看足球赛的时候，那时在半夜。
本句容易错选A项，认为是强调句型。
实际上the middle ofthe night不能单独做时间状语，如果在the middle ofthe night前面加上in，本题就可以选择A项了。故D正确。

d 试题分析：由句子意思分析可知，my father woke me up and told me to watch the football game .作状语。即my father woke me up and told me to watch the football game in the middle of the night是状语从句。因此d选项正确。如果在原题的短语the middle of the night前加个介词in 的话，那么就变成了强调句型（这样去掉it was...that ...三个词，句子意思完整，成分齐全。所以此题选a选项是错误的。句意为“ 午夜时分，我父亲叫醒我去看足球赛。”。