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-tify the one that is different from the others in pronunciation. Mark your answerby blackening the corresponding letter on the Answer Sheet.
A、 penalty
B、moment
C、quarrel
D、absent
9.Nowadays little knowledge __ to be a dangerous thing.