Question

【题目】Why did the child ________ crying last night?
A.came on
B.come on
C.keep on
D.kept on

Answer 1

【答案】C
【解析】句意：为什么孩子昨天晚上一直哭。did后接动词原形，故从B、C两项中选取一个；come on快点；keep on继续做某事，反复做某事。故选C。