The past perfect refers to a time earlier than before now. It is used to make it clear that one event happened before another in the past. It does not matter which event is mentioned first - the tense makes it clear which one happened first.
The air we breathe that is the answer I believe it's right
Answer:
D
Explanation:
The B answer was wrong so I decided to figure it out, its D
Hard question! Hope you get an answer.