Choose the word that has underlined letter pronounced differently from the others : 1. A. cover B. purpose C. pollute D. environment 2. A. effect B. efficiency C. repair D. celebrate 3. A. dripped B. conserved C. received D. measured 4, A. considerate B. predict C. describe D. sticky 5. A. generous B. groom C. congratulate D. garbage 6. A. builds B. destroys C. occurs D. prevents

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