I . Phonetics(5 points)Directions:In each of the following groups of words, there are four underlined letters or lettercombinations marked A, B, C and D. Compare the underlined parts and identify theone that is different from the others in pronunciation. Mark your answer by blackeningthe corresponding letter on the Answer Sheet.1.
A、past
B、fast
C、grandson
D、reason
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A、faint
B、strong
C、thick
D、thin
Which of the following is true about the writer when he was a ten-year-old ?