A. in theory B. mum C. painter D. struggle A. chug B. tube C. circus D. sandwich A. make mistakes B. make an effort C. come up with D. a world of A. engineer B. extinct C. believable D. dash A. portrait B. queue C. mitten D. snout A. cat B. economical C. moth D. provide A. vulnerable B. weapon C. in fear of one's life D. classify A. nursery B. dodo C. gun D. indoor A. page B. pennant C. collect maps D. instrument A. energy B. fascinating C. ribbon D. education