| 年级 | 科目 | 问题描述 | 提问时间 |
| 初一 | 英语 | ___ he came to study in the university, he has made much progress in the study of English. | 2013-12-22 20:46:53 |
| ___ he came to study in the university, he has made much progress in the study of English. A. While B. When C. Since D. After | |||
| 王老师 2013-12-23 15:08:28 | |||
C
此题中，主句用了has made...，为现在完成时 Since作为介词，后接某一确定的时间点，主句谓语动词是持续性动词， 常与现在完成时态，现在完成进行时态或过去完成时态连用 | |||
