A. cavern B. erect C. won't D. blue A. giraffe B. city-state C. friend D. laugh A. would B. white C. watch films D. downstairs A. black B. foot C. listener D. yourselves A. noble B. wrong C. window D. paradox A. grip B. flee C. arrest D. red A. natural B. orange C. fraction D. pot-holing A. influence B. yellow C. mat D. air-resistance A. downstream B. green C. do some shopping D. drink water A. metropolitan B. North American C. jar D. brown