题目内容
【题目】I kept on _______ my homework until it was dark yesterday afternoon.
A. do B. did C. doing
【答案】C
【解析】句意：昨天下午，我不断地做作业一直到天黑。根据固定搭配：keep on doing sth.不停地做某事。故答案为：C.
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题目内容
【题目】I kept on _______ my homework until it was dark yesterday afternoon.
A. do B. did C. doing
【答案】C
【解析】句意：昨天下午，我不断地做作业一直到天黑。根据固定搭配：keep on doing sth.不停地做某事。故答案为：C.