单选题 We ______ down when a waitress ______ plates of food for us.
   A) had hardly sat / had brought          B) hardly sat / brought
   C) hardly sat / had brought              D) had hardly sat / brought
【正确答案】 D
【答案解析】本题测试的是“hardly...when(一……就)”的用法，句意为：我们刚坐下侍者就为我们端上来食物。主句的谓语用过去完成时，when引导的从句用过去时。