my brother told me he.my brother told me he---a concert----A had attended ; a week beforeBattended ;a week agoCwould attend;since a week agoDwas attending;for a week
问题描述：
my brother told me he.
my brother told me he---a concert----
A had attended ; a week before
Battended ;a week ago
Cwould attend;since a week ago
Dwas attending;for a week
答
b