Directions:In each of the following groups of words,there are four underlined letters or let-ter combinations marked A,B,C and D.Compare the underlined parts and iden-tdtify the one that is different from the others in pronunciation.Mark your answerby blackening the corresponding letter on the Answer Sheet
A、actress
B、business
C、excess
D、endless
48.Why did M.S.Hershey start the production of chocolate bars?
A、He was deeply impressed by the Columbian Exposition.
B、He realized that it was possible for chocolate to become popular.
C、There was nothing to produce in his factory in Lancaster.
D、He was interested in the chocolate machinery displayed at the fair.
45.Why does the car rental company ask for the credit card number?
A、To prevent the overuse of the car.
B、To make sure that the car won't be damaged.
C、To make sure the user return the car and pay for using it.
D、To ensure that the car is safely and timely returned.