7.It was in 1998,when I was studying in a middle school, _______ I joined the League .
A.that
B.when
C.in which
D.where
正确答案是A
7.It was in 1998,when I was studying in a middle school, _______ I joined the League .
A.that
B.when
C.in which
D.where
正确答案是A