首先确定这题不是强调句哦.因为这里的it was 后面的nearly bed time只是一个表示时间的词组,并不是介词结构,所以属非强调句,故选C .比较一下下面这两个句子就会明白了：
1 It was 9 o’clock when I stared to do my home work.
2 It was at 9 o’clock that I stared to do my home work
it was nearly bed time____ Jack began to do his homework
a.until b.that c.when d.while
为什么不是强调句
首先确定这题不是强调句哦.因为这里的it was 后面的nearly bed time只是一个表示时间的词组,并不是介词结构,所以属非强调句,故选C .比较一下下面这两个句子就会明白了：
1 It was 9 o’clock when I stared to do my home work.
2 It was at 9 o’clock that I stared to do my home work