问题
选择题
—Are they about to have dinner？
—Yes, it ________ in the dinning room.
A．is serving
B．is served
C．is being served
D．serve
答案
答案：C
题目分析：考查时态。句意：—他们要开饭了吗？—恩，在客厅正在开饭。Dinner与serve（服务）构成被动关系。故C正确。
点评：试题的考查要根据上下文的语境和句子中的关键词。