The health official said ______ 12 suspected cases of influenza A (H1N1) were tested negative and ______, so far, this city has reported no case of the virus.
-----I’m afraid I’ve broken your chair. -----.I can easily get it fixed .
It was not until dark ______ he found that it was the correct way to solve the problem.
_______ breaks the law should be punished.
Einstein was __ a great scientist. He did a lot for human rights and progress.
_________ the lecture going on, the students got more and more interested.