专四题求解答，所填词在句中充当的成分？

My uncle is quite worn out from years of hard work. He is no longer the man 

_that___  he was fifteen years ago.

（1）翻译：我的叔叔由于多年繁重的工作，已经十分疲惫了。他不再是十五年前的那个男人。

（2）解析：这位朋友，我们先看看"He is no longer the man that  he was fifteen years ago."       主句“He is no longer the man”已经是一个完整的句子了，不缺什么成分；从句则不完整，只有主系，缺少一个表语，因此判断从句是定语从句。the man作为先行词。that是是连词，它连接定语从句he was fifteen years ago，又作从句中的表语（或主语补语）。

（3）补充知识点：在定语从句中，关系代词作为从句的表语时，只能用that或省略关系代词，换句话说就是用that或什么都不用！

Our factory is much more productive now. This year's production is five times _____ it was twenty years ago.

（1）翻译：我们的工厂现在生产效率提高了很多。今年的产量是二十年前的五倍。

（2）解析：这是固定句式哈。" ... times + what从句

例句：①The length of the road is four times what it was three years ago.

②The price of the meat is twice what it was last year.