Someone________the door when she was cooking in the kitchen.
| Someone________the door when she was cooking in the kitchen. |
| [ ] |
| A. had knocked B. has knocked C. knocked at D. knocked |
可能相似的问题
你能帮帮他们吗
| Someone________the door when she was cooking in the kitchen. |
| [ ] |
| A. had knocked B. has knocked C. knocked at D. knocked |
你能帮帮他们吗