Students are busy in writing without talking, so the classroom is ________.
A . bright B . quiet C . small
B
【详解】句意:学生们忙于写作而不说话,所以教室很安静。
考查形容词辨析。 bright 明亮的; quiet 安静的; small 小的;根据 “Students are busy in writing without talking” 可知,教室是安静的,故选 B 。