-- Why don't you join us for breakfast?  -- Sure! ______ 
#21102
A
Good luck!
B
Congratulations!
C
What to do?
D
Why not?
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—— Now, where is my package?—— ________. We'll be late for the train.
#2159
A
Come on
B
Forget it!
C
Don't worry.
D
Who knows?
--- How do you find your missing pen? --- Wow. _______________.
#2218
A
It writes well
B
Quite by accident
C
It lies on my desk
D
It was kept by my grandfather