—Would you mind me________ the door ?

—______________. Please do it now.

     A. closing, Of course     B. to close,  Of course  not 

C. closing, Certainly not   D. close, Certainly  

— Excuse me. Is the library open all day?

— 　　　 . Only from 8 a.m. to 4 p.m..

　　 A. Yes, of course　 B. That's right　 C. Sorry, I'm not sure　 D. Sorry, I'm afraid not