语法与词汇 I have heard both colleagues and boss _____ well of him.
【正确答案】 D
【答案解析】句意：我听到老板和同事都称赞他。不定式作feel，listen，hear，have，make，let，watch，see，notice，observe，look等感官动词的宾语的补足语时，to需要省略。