A. at the top of B. mattress C. watch out D. counteract A. comedy B. help out C. carbon D. significant A. find one's way out B. pull C. constable D. apply for A. factor B. to C. haunted D. prevent from A. gasoline B. ferment C. cabin D. clue A. puzzle B. introduction C. church D. fire extinguisher A. competition B. solar system C. hold back D. score A. Singapore B. mark out C. presenter D. astronomy A. shuttle B. harness C. dinosaur D. busy A. snowman B. in surprise C. be crazy about D. shellfish