and, or, but ; in, for, ofLaughing ______talking, the children r

and, or, but ; in, for, of
Laughing ______talking, the children ran out ______the garden.
【正确答案】：and /of
【题目解析】：动词-ing形式做伴随状语，表示主语正在进行的另一个动作，用来对谓语动词表示的动作加以修饰或作为陪衬。