单项选择题
A．Mr. Johns wasn’t at home B．the cows fed themselves C．Mr. Johns had feed the cows in the morning D．they find it difficult to feed cows
A．some examples of shooting in the US schools. B．the American’s feeling. C．some famous schools. D．that some teachers were killed by students.
A．a Frenchman B．a photographer C．a kind of camera D．a kind of picture