结构推理 9．Have you ever noticed that at yesterday's concert one of the violinists didn't produce the right note? (out of tune)

【正确答案】Have you ever noticed that at yesterday's concert one of the violinists was out of tune?

【答案解析】[译文] 你有没有注意到在昨天的音乐会上其中一个小提琴手跑调了?