--I can t find Mike. Could you tell me ?--He is in the library. A. what he is B. how he i

问题补充：

--I can t find Mike. Could you tell me ?

--He is in the library.

A. what he is B. how he is C. where he is

答案：

解析：考查宾语从句的用法。该句属于含有疑问词的宾语从句，其中用疑问词做连词；根据答语的“in the library”确定使用where“在哪里”提问。