--Why didn’t Tom have his lunch? It’s already one o’clock.---His pet bird this morning. He

问题补充：

--Why didn’t Tom have his lunch? It’s already one o’clock.

---His pet bird this morning. Hestill for quite a long time in his room crying.

A. died; had sat

B. has died; has sat

C. has died; is sitting

D. died; has been sitting

答案：

A. died; had sat

B. has died; has sat

C. has died; is sitting

(答案→)D. died; has been sitting

解析：前句this morning为发生过去；后句没有吃饭，一直在做某事，用现在完成时的进行时。