Had you joined the chat room ten minutes
题型：选择题
问题：
| Had you joined the chat room ten minutes ago, you would have known what we _____ about then. |
A. had talked B. have talked C. talk D. were talking |
| Had you joined the chat room ten minutes ago, you would have known what we _____ about then. |
A. had talked B. have talked C. talk D. were talking |