A．good fruit pickers know how fast or slow to shake a tree B．most of the fruits are badly bruised when they hit the ground C．it really makes no difference how you shake a fruit tree D．too much shaking can damage the branches
单项选择题Ostriches eat stones because they don’t have （）
A．enough food B．bird seed C．teeth D．diamonds
单项选择题This passage is about （）
A．baseball games B．cold weather C．how to play outfield D．domed stadiums
