A. trouble B. unite C. foreigner D. allegation A. broken B. squeeze C. improvise D. scientific A. keep B. carry C. espionage D. shop assistant A. hardened B. helpful C. deep D. be responsible for A. pierce B. bottom C. Mongolian D. scent A. prey B. training C. appeal to D. hesitate A. What's wrong with B. go to bed C. thorough D. wool A. crime B. drum C. cover D. pitfall A. Antarctica B. devise C. insert D. wrong A. slurp B. ageing C. warn D. for a start