…It’s surprising that he got such a high mark!
…Yes.I wonder it．
A. how did he do
B. how he did
C. why did he do
D. that he did
网友回答
A. how did he do
(答案→)B. how he did
C. why did he do
D. that he did
解析：考查宾语从句的用法。根据上句的意思：他得如此高分是很惊讶的。且答语中的Yes已经表明后者同意前面的观点，因此可以推测出：想知道的事情有可能是“怎样获得”，用疑问词how做连词；宾语从句用陈述语序，B项最合句意。