唐堂上课有个坏习惯:这堂课做别堂课的作业。算术课上,他做语文造句;语文课上,他用语文书遮(zhē)住,在下面偷偷画图画;上图画课,他轻声哼(hēn)歌,一只手还在膝(xī)盖上打拍子;上音乐课呢?他坐在最后一排做算术题。老师同学都向他指出过,这样做每堂课都听不明白,成绩就不会好 Tang Church class has a bad habit: this class do other class homework. In the math class, he made Chinese sentences; in the language class, he used language books to hide and secretly draw pictures below; on the picture lessons, he softly hummed his hand and his hand was still on the knees On the beat; music lessons? He sat in the last row to do arithmetic. Teacher classmates pointed out to him, do not understand each class doing so, the result will not be good