题目

阅读下面材料，在空白处填入适当的内容(1 个单词)或括号内单词的正确形式。Three years ago, Brian Palmer, a 43-year-old native of Beaumont, California, was a homeless man struggling 【1】(overcome) alcohol addiction. All he owned was a bag 【2】(contain) some clothes, a blanket, and a pillow. He 【3】(seek) assistance at a recovery center, the very large tent city in downtown LA. One activity that helped him through those days was singing. In 2015, he encountered the Urban Voices Project, a choir 【4】(make) up of the local people. This led him 【5】Street若一个二元一次方程的一个解为，则这个方程可能是（    ）。