Now, complete these rules! 1. We use + past participle to say that an event or situation was possible in the past.

2. We use + past participle to say we are sure something didn't happen or was impossible in the past.

3. We use + past participle to say we are sure that something happened or was true in the past.

the correct answer is d

have a goed day

did you ever get an answer? i'm on the same question : (

noun : part of speech

verb : variation

india has always been known for its ancient civilizations and contributions to the betterment of modern humankind. the written records of the first record of sugar were found, sugar was found to be used in hindu religious ceremonies and rituals along with milk, butter, cheese, and honey. the fire had been one of the very important elements in the hindu religion. the fire is known to be unpolluted.