---Have you been to the National Theatre?-No but I’ve bought two tickets for the conce

问题补充：

---Have you been to the National Theatre?

---No, but I’ve bought two tickets for the concert to be given this weekend.

A. yet

B. even

C. ever

D. already

答案：

A. yet

B. even

C. ever

(答案→)D. already

解析：考查词义辨析。yet 然而，even 甚至，ever 曾经，already 已经，句意：你去过国家剧院吗？没有，但是我已经买了两张票去看这个周末的音乐会。所以选D。