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Mr Russel is a good teacher, but he often gives ____ lectures. A. excellent B. extensive C. sound D. tedious [tedious] tedious 很郁闷的、很惹人烦的、单调乏味的 [/tedious] [excellent] excellent 优秀的、很好的 out-standing 最优秀、杰出的 [/excellent] [extensive] extensive 广泛的、广大的 [/extensive] [sound] sound n.声音、adj.非常好的、健全的 | 
