题目

It seemed like a typical November day two years ago, as I walked out of Walgreens, a store near my house. It was just a month after my grandmother had passed away and I spent my days running useless errands (杂事) hoping to fill the emptiness in my heart and distract me from the pain.As I attempted to walk out of the store, I felt exhausted and hopeless and began walking to my car. Suddenly, a woman driving right by my side rolled down her window. “Excuse me, excuse me, excuse me,” she said loudly. Thinking she was going to ask for my parking spot, I simply pointed to my car. “No, excu14．甲、乙两个工程队分别从两端同时开凿一条隧道．甲队每天凿9米，乙队每天凿11米，120天后凿完，求这条隧道的长度？