The old man who lives _____ the second floor is very fr
| The old man who lives _____ the second floor is very friendly. |
| [ ] |
| A. on B. in C. at |
可能相似的问题
你能帮帮他们吗
| The old man who lives _____ the second floor is very friendly. |
| [ ] |
| A. on B. in C. at |
你能帮帮他们吗