农谚说得好：“有心栽花花不开，无心插柳柳成阴”，这句话描述了柳树的生长繁殖特点，其繁殖方式是 [ ]
A．有性生殖
B．压条
C．扦插
D．嫁接
C
有的中学生沉迷于电子游戏，严重影响了学业和身心健康。可见 [ ]
①玩电子游戏有百害而无一利 ②沉迷于电子游戏有害身心健康 ③玩电子游戏要有节制 ④我们要以丰富的学习、健身、交友等活动坚决抵制这一诱惑
A．①③④
B．②③④
C．①②④
D．①②③④
— I'll tell Mary about our changes tomorrow.
— What? You ______ her yesterday. [ ]
A. ought to tell
B. must have told
C. might have told
D. should have told
