1、这个题考查的是强调句型.It was .that .句型.强调句型去掉It was 和that 句子仍成立.比如题中的句子,去掉It was .that .之后J就成为,John didn't come home until the midnight ..
2、强调 until 句型时,如果前面是否定句,必须吧not 一并提前进行强调,所以就是It was not until the midnight 了.
3、做题时,一看到it was 就应该想到他是不是在考查强调句.这是做题技巧
希望这个答案你能满意