Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Don't blame the kid. He broke the glasses （ ）. (accidental)
【正确答案】：ACCIDENTALLY
【题目解析】：
根据前文he broke the glasses句子结构完整，说明空格处应该填副词形式来修饰动词，accidental的副词形式为accidentally碰巧地，不小心地，且符合句意。句意：别责怪那孩子。他不小心打碎了眼镜。