A. twenty-one B. air conditioner C. linguistics D. run out of A. more and more B. eleven C. curl D. unexplained A. consult B. blackberry C. sixty D. DIY A. do exercise B. twenty-eight C. boarding D. prove A. keep up B. look down on C. twenty-seven D. primary A. lately B. thirty C. correction D. sell out A. knowledge B. free C. obey D. seventy A. look back at B. thick C. twenty-four D. unhappy A. twelve B. foolish C. get hold of D. creditor A. bread maker B. forty C. wandering D. home town