谁在春天里歌唱？Swallow sings in spring。燕子在春天里歌唱。Who sings in summer?谁在夏天里歌唱？Cicada sings in summer。知了在夏天里歌唱。Who sings in fall?谁在秋天里歌唱？Wild duck sings in fall。野鸭在秋天里歌唱。Who sings in winter?谁在冬天里歌唱？North wind sings in winter。北风冬天里歌唱。