WHAT IS THE MAIN IDEA OF THE PASSAGE

30. What is the main idea of the passage? A. Two kinds of aquatic sports B. The popularity of aquatic sports C .Aquatic sports — kinds and benefits D. Swimming and breathingNOTES PRACTICE TEST 6Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlinedpart is pronounced differently from that of the rest in each of the following questions.