---Whydidn'tTonyhavehislunch?It'salreadyoneo'clock．---Hispet

---Why didn't Tony have his lunch? It's already one o'clock．---His pet bird ________ this morning．He ________ still for quite a long time in his room crying．A.died; had satB.has died; has satC.has died; is sittingD.died; has been sitting

D解析考查动词时态。——Tom为什么没有吃午饭?快1点了。——今天早上他的宠物鸟死了。他一动不动地坐在屋里哭了很长时间了。根据题干中的this morning可知第1个空应用一般过去时来表示叙述客观事实；根据第一个说的话和for quite a time可以判断出Tom现在还很可能在屋里哭，因此第2空用现在完成进行时，表示动作发生在过去且一直持续到现在而且有可能继续下去。

这下我知道了

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