Mary and I have been close friends ______ we met each other 10 years ago.
—Hi, Betty.Would you like to go to see a movie with me tonight? —Sorry, Mary._________ tomorrow’s lessons, I have no time to go out with you.
He has made a discovery, _________ of great importance to the progress of science and technology.
Rosy came in for _________ coffee and told me _________ firecrackers outside kept her awake last night.
—Dad, where on earth did you put my raincoat? —Oh, Jim.I forgot to tell you.It _________ behind your bedroom door.
In autumn, _________ the weather is often cool and fine, people living in the city always like climbing hills for outdoor activities to strengthen their health.