3. The director _____ traffic safety in his talk.
A. drew in

B. settled down

C. felt like

D. dwelt on

答案： D

draw in （天）渐黑，（白昼）渐短；（汽车或火车）到站

settle down 定居，过安定的生活；平静下来；定下心来

feel like 想要

dwell on/upon 老是想着，详述