*72.I've become good friends with several of the students in

翻译：我已经和我们学校的几个学生成为好朋友了,我在去年的英语演讲竞赛中遇见了他们.
解释：此题难在对定语从句所修饰的先行词的判断.
定语从句I met in the English speech contest last year中,明显在谓语动词met后面缺少表示sb的宾语,所以正确答案为A.
关系代词who代替先行词the studnets,在定语从句中充当met的宾语.
即：who I met in the English speech contest last year
= I met who/whom in the English speech contest last year
= I met (several of the students in my school) in the English speech contest last year
而其他选项均无须考虑.