I forgot to include the following sentences. Could you please check them, too?
1) It wasn’t frightened of humans.
Stay home/at home. (both possible?)
I didn’t dare speak/to speak (I think both are possible)
2) He offered to come with me the next day.
He confessed that he had robbed the bank.
3) As this elephant has learned to trust humans, the other elephants can learn it too.
4) It needed (instead of “it took” is possible?) a long time for Mary to get ready.
5) I wouldn’t consider/evaluate it “as” a mistake (an error).
1) It wasn’t frightened of humans.
Stay home/at home. (both possible?) OK
I didn’t dare speak/to speak (I think both are possible) OK
2) Both OK
3) OK
4) It needed (instead of “it took” is possible?) a long time for Mary to get ready. no -- "It took a long time..."
5) I wouldn’t consider it a mistake (an error).