问题补充：
I met him，he was working as a secretary in a big company.
A. Since the first time
B. The first time
C. For the first time
D. The first time which
答案：
A. Since the first time
(答案→)B. The first time
C. For the first time
D. The first time which
解析：考查名词短语相当于连词。The first time+从句=When +从句+for the first time.类似的短语还有：the last time, each time, every time等。
