A.people are unconcerned about politeness nowadays.
B."thank you" remains the best expression of gratitude.
C.there is a variety of expressions of appreciation.
D.there are more formal expressions than informal ones.




A.Thanks.
B.Cheers.
C.Brilliant.
D.You star.
A.Thanks.
B.Cheers.
C.Nice one.
D.Sure.
A.culture.
B.gender.
C.formality.
D.circumstance.