1. --Do you mind my closing the window? It is a bit cold in here.

-- __________, as a matter of fact.

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

2. --Have you seen _______ new bike? I put it here just now.

  --Is it _______ white one? A boy has ridden it away.

A. a; a                           B. a; the                C. the; the             D. the; a