单项选择题
A．when it is hungry B．before it plays a trick C．when it starts to play a trick D．after it has done the trick
A．would talk about football with him B．liked to cut his hair C．could cut his hair as he wanted it D．would become his friend
A．throwing stones often caused injuries B．throwing stones was not fun C．games with stones did not have rules D．rocks were too heavy to throw