A. hello B. almost C. weightlessly D. throng A. census B. sorry C. painting D. tunnel A. machine B. mainly C. healthily D. wane A. medicine B. acquaintance C. hide D. opera A. gesture B. have a headache C. decide D. fairytale A. stayed B. collect C. disappointed D. jet lag A. smell B. keep from C. treat D. musty A. voting B. let out C. worried D. ascertain A. Beijing Opera B. simplify C. at present D. upset A. give in B. gymnast C. northwestern D. lonely