Directions:In each of the following groups of words,there are four underlined letters or letter 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、combination
B、climbing
C、bamboo
D、ambition
17.The employees___more enthusiastic about their work since their pay rose.
A、are
B、have been
C、were
D、will be
14.Despite the sudden breakdown of the General Manager,__work is going on in the company.