A. come on B. incompetent C. change D. homestay A. underestimate B. restroom C. lonely D. bunny A. cave B. in vain C. for a start D. raise A. writer B. discern C. envy D. excited A. by boat B. Canadian C. difficulty D. nationwide A. at night B. stalactite C. door D. What's wrong with A. force B. agency C. regardless D. sign A. headlight B. whisper C. aerospace D. give out A. interest B. behalf C. practice D. ideal A. spark B. satisfying C. owner D. agriculture