Did your brother have a good time?(作肯定回答)
Yes, ____ ____ .
在同一水平直线上的两位置分别沿同方向水平抛出两个小球A和B,其运动轨迹如图所示,不计空气阻力,要使两球在空中相遇,则必须( )
Lisa said, “The music ____ (sound) beautiful, doesn't it?”