Is that the day we’ll never forget.
It was the largest experiment we had ever had; it _____ six hours.
I have been looking for this book for months, and _____ I have found it.
He offered to _____ her a hand as the suitcase was too heavy for her to carry.
I'm sorry but what he thinks is not of the _____ importance to me.
Animals should not be locked in cages; they should be in their normal _____.