試題詳解

9. Which sentence is an example of the word “gratuity”?
(A) Peter was asked to pay a huge ransom for the return of his son.
(B) Tom was thrilled to find that he had won the big lottery.
(C) Henry gave his waiter a $5 tip after eating at the restaurant.
(D) Mark demanded to know why he had to pay a 45% tax.