单项选择题 —Mum, it is nice weather. I want to skate this afternoon. —Don't you think the ice on the lake is too thin to （）your weight

单项选择题 —Where is the telephone book —Oh, I left it in the next-door room. I （）it for you.

单项选择题 最早在教学理论上提出班级授课制思想的是( )。