This is the engineer who he cooperated with in the project.

   先行詞指人時，關系代詞既可以用who, 也可以用that。但關系代詞在定語從句中用作主語時，多用主格who。如：

   ★ Beyond the practical need to make order out of chaos, the rise of the dictionaries is associated with the rise of the English middle class, who were anxious to define and circumscribe the various world to conquer.（persons, those, people等先行詞多用關系代詞who）

   ★ It is Tom who should be punished.（在強調結構中，指人時多用who）

   ★ The American zoologist Donald Griffin, who was largely responsible for the discovery of sonar in bats, coined the term ‘echolocation’ to cover both sonar and radar, whether used by animals or by human instruments.

   朗閣海外考試研究中心分析認為，在下列情況中多用that, 而不用who或者which。如：

   ★ much       （很多）

   little         （很少）

   none         （沒有任何）

   everything   （任何事情）             +先行詞 +that

   everybody   （任何人）

   nothing      （沒有任何）

   nobody     （沒有人）

   E.g. There is nothing in the world that can frighten him.

   ★ 先行詞前面有最高級形容詞修飾時

   He is the most boring speaker that I have ever heard.

   This is the most interesting book that I have ever read.

   ★ 先行詞有以下代詞或者有下列代詞修飾時

   the first

   the last

   the only

   the same                    +先行詞 +that

   the very

   all

   any

   no

   every

   E.g. This is the last chance that you have.

   This is the very thing that I lost yesterday.

   This is the first thing that he wants to do.

   You are the only friend that we have.

   He is the last person that Tom wants to see.

   He has told the police all that he knew.

   ★ 前面已經有疑問詞who或者which時

   E.g. Who that knows him will trust him?

   Which of these trains is the one that goes to Nanjing?

   Which is the bike that you have lost?

   ★ 兼指人和物/事物時

   E.g. The man and the horse that fell into the river were drowned.

   Look at the girl and her dog that are crossing the bridge.

   在下列情況中則多用which。如：

   ★ 離先行詞較遠時

   He told me the story of the craftsman which I narrated at the beginning of this book.

   ★ those + 復數(shù)名詞 之后

   You should b