The noise pollution survey revealed a rather spurringand possibly amusing old fashioned source of noise. It turned out to be snoring! Menwere found to be the worst offenders.

　　19.The noise pollution survey revealed a rather spurring and possibly amusing oldfashioned source of noise.

　　这个有关噪音的污染调查还揭示了一种出人意外而同时可能会引人意外而同时可能会引人发笑的老式噪音源。

　　20.It turned out to be snoring!

　　它竟然是鼾声。

　　21.Men were found to be the worst offenders.

　　男人是这方面的罪魁祸首。