______all the homework assigned by the school the students have to work at it till midnight
Was it because she was ill______she didn’t go to attend the meeting?
The machine has been used for several years. It needs______.
Be quiet______you will wake the whole house!
—Are you still employed at the post office? —Yes,I______here since 1982.
_____a written permission, he had to write another letter to the president of the university.