—He was downloading reading materials from a website when the puter crashed.
— that he looked a little upset.
A. No doubt
B. No use
C. No wonder
D. No problem
网友回答
A. No doubt
B. No use
(答案→)C. No wonder
D. No problem
解析：本题考查名词短语辨析。No wonder that...难怪……；……不足为奇/并不奇怪。no doubt意为“无疑，毫无疑问”；no problem意为“没问题”。