3. 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、P(o)st
B、c(o)st
C、m(o)st
D、h(o)st
What measure is being taken by the UK to cut back on the use of plastics?