问题补充：
I knew we would be friends I met you on campus.
A. the first time
B. at the first time
C. for the first time
D. by the first time
答案：
(答案→)A. the first time
B. at the first time
C. for the first time
D. by the first time
解析：考查连词。I knew we would be friends和I met you on campus都是句子，两个句子要用连词连接，四个选项中只有the first time是连词，其他三个都只能作时间状语，所以选A。
