20. - Lucy, could you please spare me a few minutes?

　　 - ________, but I hope “a few minutes” won’t turn into an hour.

　　 A．It doesn’t matter　　　　　　　　　　　　 B．That’s kind of you

C．I’m afraid not　　　　　　　　　　　　　 D．I guess so.

19．Leonardo Da Vince _______ birds kept in cages in order to have the pleasure of setting them free．

　 A．is said to be buying　　　　　　　　　　　　 B．is said to have bought

　 C．had said to buy　　　　　　　　　　　　　　 D．who said to have bought