.After staying in hospital for long, the patient was advised to go to the seaside to his health.
Go and get your coat. It’s ________ you left it.
I remember ________used to be a quiet village.
________ the 2020 Olympic Games will be held in Beijing is not known yet.
–I think it’s going to be a big problem. --Yes, it could be. --I wonder ________ we can do about it.
Little Tommy was reluctant to tell the schoolmaster _____ he had done the day before.