A. understand B. battered C. rode D. turn into A. mammal B. good-humouredly C. out D. had a cold A. till B. lazy C. addicted D. differently A. skin B. in fear of one's life C. at the speed of D. heavier A. incidentally B. smooth C. ate D. trainer A. taste B. faster C. before D. haunt A. could B. boom C. magazine D. have connection with A. stay B. ignore C. forgery D. mix A. airfield B. cleverly C. blacken D. saw A. airmail B. motorbike C. shopping D. dinosaur