— So nice to see you, Lucy! I never thought you visit us today.
— Sorry, I forgot to tell you I was ing. I hope you don’t mind me .
A. calling in
B. pulling in
C. breaking in
D. dropping in
网友回答
A. calling in
B. pulling in
C. breaking in
(答案→)D. dropping in
解析：短语动词辨识题。由I forgot to tell you I was ing一句可知，答话人是偶然造访。drop in: 顺便拜访。call sth. in: 要求收回、召回。pull in：（火车）进站。break in: 强行闯入。故D项正确。