Mr Smith, of the speech, started to read a novel.
A. tired; boring
B. tiring; bored
C. tired; bored
D. tiring; boring
网友回答
(答案→)A. tired; boring
B. tiring; bored
C. tired; bored
D. tiring; boring
解析：tired of…是过去分词短语作原因状语，boring 是现在分词作定语，表示speech本身的特点。