《预防未成年人犯罪法》设专章规定了对未成年人严重不良行为的矫正。这些“严重不良行为”包括( )
①学习成绩差 ②纠集他人寻衅滋事
③旷课、夜不归宿 ④吸食毒品
A:①②
B:①③
C:②④
D:②③
Don’t mention that at the beginning of the story,or it may ______ the shocking ending. ( )
— I'll go to Hainan with my parents fo r the winter holiday next week.
— Really? ______________!