In the middle of our lunch there was a knock at th...

Câu hỏi: In the middle of our lunch there was a knock at the door.When _____________________________________

A. we were having lunch, there was a knock at the door.

B. we knocked at the door, we were having lunch.

C. we had just finished lunch, there was a knock at the door.

D. our lunch were in the middle there Was a knock at the door.