—Hey ,it’s you, Jackie! I didn’t think you could be here.—A big surprise ,right? I _______ for you all the afternoon.
#100196
A
have waited
B
was waiting
C
have been waiting
D
waited
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Edward, you play so well. But I ________ you played the piano.
#104527
A
didn’t know
B
hadn’t known
C
don’t know
D
haven’t known
—Will you please repeat your idea?—Certainly. But I think it convinced you ________ your attention.
#101250
A
didn’t pay
B
aren’t paying
C
don’t pay
D
weren’t paying
The country life he was accustomed to________ greatly since 1992. 
#101373
A
has changed
B
change
C
changing
D
have changed