---Have you been to the National Theatre? ---No, but I’ve         bought two tickets for the concert to be given this weekend.
#24123
A
yet
B
even
C
ever
D
already
推荐题目
--___do you clean the reading room? ---Every two or three days.
#25020
A
How long
B
How far
C
How soon
D
How often
I’ve never seen _______ film as this. 
#24966
A
so a touching
B
so touching
C
a so touching
D
so touching a