A. ambassador B. once or twice C. this D. folk song A. eraser B. invaluable C. instructions D. exercise A. carnival B. live C. fast food D. junior college A. advance B. Lost and Found C. narrowly D. catch a cold A. read out B. sawmill C. heart D. devote A. loan B. trade C. stomach ache D. sheltered A. baleen whale B. pet C. lots of D. brilliant A. I'd like B. effectiveness C. fever D. population A. softball B. take part in C. poisonous D. in time A. crayon B. occasion C. gatekeeper D. ill