单项选择题
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．they were too hungry B．they wanted to fight with the men C．they wanted to go on strike D．they were so angry at their masters
A．watch lots of films B．buy an expensive camera C．stop in most cities D．take with him other machines apart from film