https://online2.tingclass.net/lesson/shi0529/0008/8490/76.mp3
https://image.tingclass.net/statics/js/2012
16.Mr Russel is a good teacher, but he often gives ____ lectures.
A. excellent B. extensive C. sound D. tedious
tedious 很郁闷的、很惹人烦的、单调乏味的
excellent 优秀的、很好的
out-standing 最优秀、杰出的
extensive 广泛的、广大的
sound n.声音、adj.非常好的、健全的
