20．--Do you mind my opening the window for n while?

--　 .

　　 A.No,thanks　　 B．N0．I do　　 C. Yes,please　　 D．Yes．Better not

19．--Have you read the book Oliver Twist?

--Who　 it?

　 A.writes　　 B.wrote　　 C.has written　　 D.had written

18．Is this the house　 Abraham Lincoln was born?

　 A.on which　　 B.which　　 C．in which　　 D．that

17.-I hope that you can remove the difference between you and Susan and become good friends．

　 --　 If only Susan had the same idml．

　 A.My pleasure．　　 B.For what?　　 C.Why me?　　 D．By all means.