单选题 John"s mindless exterior concealed a warm and kindhearted nature.
【正确答案】 A
【答案解析】[解析] exterior为名词,意为“外面;外貌;外表”,如:She maintained a calm exterior, though really she was furious.(在外表上她保持着平静,但实际上她生气极了。)故A选项appearance“外貌,外表”正确,其他词项的意义分别为:personality“人格,个性”,outlook“景色,风光;观点”,temper“脾气”。