A. gel B. laughter C. prevailing D. staple A. son B. Amazon C. necessary D. encounter A. underground B. rain C. emission D. with A. barbarian B. handsome C. chairperson D. praise A. gallery B. heartily C. gunpowder D. rational A. worse B. wander C. kindness D. premise A. energize B. civilisation C. incumbent D. north-west A. termite B. gasoline C. France D. champagne A. lock B. postcode C. aberrant D. mark out A. potato chips B. gray C. exciting D. variant