企源知识库

They were hungry and cold and_________for hours for a relief truck to arrive.
A、 have been waiting
B、 had waited
C、 had been waiting
D、 had been waited
【正确答案】：C
【题目解析】：此题考查的是过去完成进行时。句子的意思是他们又冷又饿等了好几个小时的救援车。谓语动词是were，动作发生在过去，他们到那时为止一直在等待，因此用完成进行时。