5答案及解析：
答案：Only when he came back did I know the whole story.
6答案及解析： 答案：It was he
which showed me how to smile through the rough times.
who/that解析：句意:是他教我如何笑着度过艰难的时期被强调部分为句子的主语he,指人,故将which改为who或that.
7答案及解析：
答案：This has to change because it is not clothes or shoes that
makes a person. make解析：句意:这必须有所改变,因为造就一个人的不是衣服和鞋子。分析句子结构可知,该句为强调句型.强调主语clothes or shoes,所以谓语动词应用复数形式。
8答案及解析：
答案：It was at his uncle’s home
9答案及解析：
答案：It was this morning
10答案及解析：
答案：It was in the street where there were lots of shops
where Jack broke a glass yesterday afternoon. thatwhen I came across my former teacher in the supermarket. that?that I met him.