試題詳解

60.What is implied about credit cards in the passage? 
(A)Credit cards used to be popular in the 1950s but not now. ‚
(B)It took a long time for people to accept this way of payment. ƒ
(C)They have been used for about 60 years since their appearance. „
(D)By the end of 1950, they had been widely used all over America.