A. require B. inn C. sometimes D. salad A. apology B. do exercise C. turbulent D. academic A. steadily B. optional C. once in a while D. maglev train A. naturally B. vessel C. recommend D. resource A. revolve B. writing paper C. minibus D. everybody A. examiner B. secrecy C. adjust to D. accustomed to A. autonomous B. English-speaking C. take a shower D. toothache A. why not B. Motherland C. found D. reinforce A. savannah B. rely C. South Africa D. visa A. hidden B. meeting C. abundant D. in surprise