题目

I was 16 years old the day I skipped school for the first time. It was easily done: Both my parents left for work before my school bus arrived on weekdays, so when it showed up at my house on that cold winter morning, I simply did not get on. The perfect crime! And what did I do with myself on that glorious stolen day, with no adult in charge and no limits on my activities? Did I get high? Hit the mall for a shoplifting extravaganza (狂欢 )? Nope. I built a warm fire in the wood stove, prepared a bowl of popcorn, grabbed a blanket, and read. I was thrilled and transported by a book—it wasI'mgoingto ________ateacher. ( )A. is B. be C. am