by Unless someone has a key, we cannot get into the house
A. We could not get into the house if someone had a key.
B. If someone does not have a key, we can only get into the house.
C. We can only get into the house if someone has a key.
D. If someone did not have a key we could not get into the house.
Câu trả lời là: D là đáp án đúng
