A. Niagara Falls B. book C. output D. cable car A. past B. continue C. Thailand D. would rather A. juvenile B. organic C. keep from D. population A. hold up B. willing C. catch one's attention D. battle A. community B. angle C. summary D. stir-fry A. expand B. popcorn C. horizontal D. come out A. programme B. alphabet C. macaroni D. chemical A. integrated B. profound C. circular D. statistic A. effort B. development C. heaven D. circulate A. root B. no longer C. float D. New Zealand