A. multiply B. omen C. sensitive D. lay eggs A. reaction B. ahead of C. economic D. high blood pressure A. under construction B. satellite C. routine D. environmental A. circulate B. disregard C. composition D. puzzle A. Austria B. pull C. athlete D. Chinese paper-cutting A. there B. aerospace C. nitrogen D. strait A. great B. violin C. participant D. fundamental A. radio B. downhill C. carbon dioxide D. be friends with A. southwest B. heartily C. astronomer D. quarrel A. mammal B. identify C. actress D. minute