单选题 2.  The continuous intense heat ______ the already serious shortage of food.
【正确答案】 D
【答案解析】 agonize意为“使(极度)痛苦,折磨”,agitate表示“激动,使焦虑不安”,如:The fiery speech agitated the crow. aggregate表示“聚集,总计达”如:The audiences aggregated a million people. aggravate意为“使……加重(恶化)”,如:Smoking aggravates a cold.此处指情况进一步恶化,因此选D。