Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
It is very （ ） to interrupt during someone's conversation.(courtesy)
【正确答案】：DISCOURTEOUS
【题目解析】：
根据前文it is very说明空格处应该填一个形容词，courtesy的形容词为courteous有礼貌的和discourteous无礼貌的，失礼的。根据句意，后文说打断别人的对话。所以应该是不礼貌的，填discourteous。句意：打断别人的谈话是很不礼貌的。