问题补充：
Lily was talking to our teacher about examination, when suddenly Tom .
A. cut off
B. cut out
C. cut up
D. cut in
答案：
A. cut off
B. cut out
C. cut up
(答案→)D. cut in
解析：考查动词辨析：A. cut off切断，B. cut out剪下，C. cut up切碎，D. cut in插话，句意：莉莉正在和老师谈论关于考试的事情，这是汤姆突然插话。所以选D。
