2.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.()
A、f(ear)
B、b(ear)
C、w(ear)
D、p(ear)
.I couldn't go to the meeting because I had to()my brother after his accident.
A、take after
B、look after
C、look over
D、take over
Researchers are trying to()what’s wrong with their experiments.