While giving the speech, Doc. Kim his notebook now and then.
A. referred to
B. cut off
C. starred in
D. carried on
网友回答
(答案→)A. referred to
B. cut off
C. starred in
D. carried on
解析：句意：当Kim博士做演讲时，他不时地看一下笔记。refer to参考；cut off切断；star in主演；carry on继续。根据句意故选A。