题目

I’ve become good friends with several of the students in my school ________ I met in the English speech contest last year. A. who            B. where              C. when                D. which            答案：A  考查定语从句。该空引导定语从句修饰表示人的先行词the students，且在从句中作met的宾语，故选关系代词who，即A项。  21、You can buy some food in the supermarket _________ you’re hungry． A．because               B．if                         C．but                        D．so