A．example
B．excuse
C．expert
D．express

A. But why
B. I’m glad to hear it.
C. I don’t think I’ve had the pleasure.
D. I forgive you.
E. Congratulations!
F. Don’t worry about it.
G. By the way.
H. I’m afraid not.

A．mistakes
B．flaws
C．errors
D．wrongs