问题
选择题
Tom concluded his lecture ________ that he couldn’t emphasize enough how important our efforts were.
A．to say
B．saying
C．said
D．having said
答案
答案：B
考查非谓语动词。根据句子结构可知可知此处saying做状语，say与逻辑主语之间是主动关系，故选择saying。