填空：The police think the old man must have ____(联系) with the number that happened last night.

分类: 作业答案 • 2021-12-31 13:00:59

问题描述：

填空：The police think the old man must have ____(联系) with the number that happened last night.
速度啊!

答

contactedcontact with与……联系。用过去分词是因为must have done表示对过去事实的肯定推测