34 --I can't find Mr Smith.Where did you meet him just now?

where (表地点）
补答：
既然,您对答案不满意.让我详细讲解.以前给学生讲课,强调的是语感,多给学生练类似的经典口语,台词之类.今天破例,I will give u a more detailed answer.
首先（_____ he worked）是一个定语从句修饰前面的office,说明是什么样的office,是他工作的office.office 又回答了前句的where(Where did you meet him just now).显然,用where引导一个定语从句,而且where的先行词是office.
其次,选B,C或D的话,它们(which,that,the one)在从句中都是work的宾语（A,WHERE不是,where是做状语）.而在英语当中work 表示工作（动词）的时候,是不及物动词,是不能有宾语的.
work要接上宾语,做及物动词,就是使工作的意思（而不是工作,是使别人或东西工作）.
如：
To cause to work:
使工作：
works his laborers hard.
让他的工人努力工作
如果选了Which,that或the one,给native speaker的感觉就是：他让他的办公室工作了.而这是不合逻辑的.
举例：It was the disco where she found her boyfriend.
It was China where the couple adopted a child.
It was Shanghai where he worked.
I can't find Mr Smith.Where did you meet him just now?
--It was in his office _____ he worked.
A.where B.which C.that D.the one