— Yes. He has just been back, ________ like a dog.

A. to be tired B. is tired C. tiring D. tired

【答案】D

【解析】

试题分析：考查形容词。句意：昨晚他又通宵工作了吗？是的，刚回来，累坏了。Tired like a dog累极了，故选D项。