从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
26．As we all know, a large number of people in the world learn_____ English as ____ second language.
A．the; 不填 B．an; the C．不填; the D．不填；a
27．---I’m sorry to tell you that the tickets for tonight’s show have been sold out.
---Oh, no! _____.
A．I was looking forward to that B．It doesn’t matter
C．I know it already D．It’s not interesting at all
