发布网友 发布时间:2024-08-19 01:57
共4个回答
热心网友 时间:2024-08-23 09:04
答案:C. had had热心网友 时间:2024-08-23 08:59
选c came是过去式,before前面应该用一个过去完成时。热心网友 时间:2024-08-23 09:00
I ________ a very beautiful pet dog before I came to live in this city about four years ago. A. have had B. have C. had had D. have bought热心网友 时间:2024-08-23 09:00
-ccccccc. came已经是过去式了。在它之前的肯定也是过去式 故第一个用had had后面跟过去分词 第二个had