下列关于声的论述中，正确的是（　　）

A．声只能传递信息

B．声只能传递能量

C．声有时传递能量，有时传递信息

D．声传递信息和能量是同时进行的

Only when _________ the tea-house _______ it was the same place he’d been in last year. [ ]

A. did he reach; he realized      

B. he reached; he realized

C. he reached; did he realize    

D. did he reach; did he realize