17.in silence在沉默中18.burst into laughter突然笑出声来19.concentrate on..全神贯注于.20.be replaced by被.所取代21.for the purpose of..为了22.distinguish..from.区分.与23.communicate...
8.Jenny walked slowly to the front,with her legs trembling and herheart bumping near ly out of her chest.Jenny慢慢走到讲台,腿发抖,心都快跳出来了。9.She choked and her eyes brimme...