I was excited ＿＿ I came to this school.A. for the first time B. the first time C. at first

I was excited ＿＿ I came to this school.
A. for the first time
B. the first time
C. at first
D. the first time when

A. for the first time (答案→)B. the first time C. at first D. the first time when解析：A 第一次，做状语B 第一次，名词充当连词C 首先，起初观察句子结构，可以看出句子缺少连接词，故选B。D答案连词重复。句意：我第一次来到这所学校就很兴奋。

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