通过对声现象的学习，你认为下列说法中正确的是:                  

A．只要物体振动就一定能听到声音

B．“震耳欲聋”说明声音的音调高

C．在校园内植树是在声源处减弱噪声

D．在狭窄的空间里说话，回声可以加强原声

—_____ your mother go fishing?

—No, she didn't.  She went shopping.        [ ]

A. Does

B. Is

C. Did

D. do