A. reservoir B. ignorance C. poor D. clean-up A. space travel B. description C. trouble D. profound A. gaily B. say C. volcanology D. ahead of A. north-east B. salmonella C. use D. contents A. clog B. sailing C. celebrate D. Chinese book A. stone B. whine C. habit D. delusion A. Brazil B. ibis C. trickle D. pollution A. leisure B. cobra C. take turns D. knock on the door A. rickety B. producer C. garlic D. hide-and-seek A. outlet B. sentence C. tend D. controversy