The two students met the first time at the beginning of this term.met---met for

问题补充：

The two students met the first time at the beginning of this term.met---met for

答案：

(答案→)met---met for

解析：一般来说，the first time的词性是连词，用来引导时间状语从句；而for the first time的词性是副词，在句中作状语。