—You ______ turn on the light. It's bright enough here.    

—OK. I will turn it off right now.   [ ]

A. mustn't

B. can't

C. needn't

D. won't

播音的内在语指那些在播音语言中（）出来的语句关系和语句本质。在戏剧表演中，也叫“潜台词”。

A.不便表露

B.不能表露

C.没有完全表露

D.没有直接表露