—I had been working till 4 a. m. to prepare a report for my boss.
— you look very tired.
A. No doubt
B. No hurry
C. No wonder
D. No need
网友回答
A. No doubt
B. No hurry
(答案→)C. No wonder
D. No need
解析：No doubt毫无疑问，No hurry不急，No wonder难怪，No need没有必要，句意：我一直工作到凌晨四点为我的老板准备了一份报告。难怪你看起来非常累。故选C。