Question

Although the play had already been on for 10 minutes, I was

Answer 1

C

考查不定式做定语，如果不定式的动词是不及物动词，这题不定式修饰a seat，要加相应的介词，sit on the seat，句意：虽然戏剧已经开始10分钟了，我还找不到座位坐下。选C。