27. The Grand Theatre in Shanghai is open to visitors during the daytime ______ there is a performance going on.
The man in the corner confessed to _____ a lie to the manager of the company.
I don't mind _____ the decision as long as it is not too late.
They used what they had _____ for their daughter.
_____ by the appearance, he has just been frightened at the terrible news.
Professor Smith is said _____ another important discovery in chemistry.