---George, how can you prove the earth is round ?--- I can’t, sir. ______ , I never said it was.
I wasn’t told _____.So I called you for help.
The old man felt quite lonely _____ such a cold night.
In those days, few people liked dancing,_____?
-- Is the Nanjing Bridge open to the public yet? ---Yes. It ____ for almost one and a half months .
Jim gave up _____ Chinese. He thought it was too hard.