I.Phonetics(5 points) 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 answer by blackening the corresponding letter on the Answer Sheet.
A、captain
B、obtain
C、contain
D、retain
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.
12.I feel very excited__ the thought of joining my family in a week..