Directions:In each of the following groups of words, there are four underlined letters or ltter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet’
A、 action
B、 section
C、 solution
D、 question
28.()
A、formed
B、shaped
C、composed
D、designed
What happened after the engineer learmed“doing nothing ?