Mary took a part-time job last summer, but her parents were unhappy about_____she did.
A、these
B、which
C、that
D、what
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