A. suspect B. step C. be worried about D. used to A. be different from B. at once C. fortune-teller D. Christ A. environment B. orgy C. apple D. birthday A. warn B. wind C. give sb a ride D. slope A. assistance B. protect C. ever since D. accustomed A. authentic B. jam C. textbook D. cooperation A. safeguard B. catalogue C. bubble D. cheque A. look forward to B. critic C. stone D. guest A. steam B. walking C. kill D. ever A. feel like B. reform C. avoid D. hostile