单选题 I know this is frustrating, but please try not to lose your temper.
【正确答案】 D
【答案解析】behave stupidly：表现得愚蠢；get impatient：有耐心的；become moody：变得忧郁；get angry：发火，生气。题中lose your temper意为“发脾气”，故可知D选项为正确。