—I had been working till 4 a. m. to prepare a report for my boss.—you look very tired.A. N

—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

A. No doubtB. No hurry(答案→)C. No wonderD. 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。

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