【文章內(nèi)容簡介】
ore if the bridge had been done (13) _____ pink or baby blue. Light and (14) _____ colours make people (15) _____ happier but (16) _____. It is an established fact (17) _____ factory workers work better (18) _____ and have (19) _____ accidents when their machines are painted orange rather (20) _____ black or dark gray. 1. A. game B. colour C. idea D. friend 2. A. friends B. parents C. excite D. excitement 3. A. probably B. possible C. sure D. better