—— Do you mind my opening the window? It’s a bit hot in here.  

——          , as a matter of fact 

A. Go ahead      B. Yes, my pleasure 

C. Yes, I do      D. Come on 

—— Do you mind my opening the window? It’s a bit hot in here. 

    —— ______ , as a matter of fact

A. Go ahead      B. Yes, my pleasure

C. Yes, I do      D. Come on

---- Do you mind my opening the window? It’s a bit hot in here

---- ______, as a matter of fact.

      A. Go ahead               B. Yes, my pleasure

C. Yes, I do                D. Come on

 —— Do you mind my opening the window? It’s a bit hot in here.

——________, as a matter of fact

A. Go ahead                        B. Yes, my pleasure                   C. Yes, I do               D. Come on

 —— Do you mind my opening the window? It’s a bit hot in here.  

——          , as a matter of fact 

A. Go ahead      B. Yes, my pleasure 

C. Yes, I do      D. Come on