---Do you think you can finish the project by five o’clock this afternoon?---_______. I’ll be busy with my term paper all day.
___ the end of this new term we'll have graducated from middle school.
The mid-term exam is to be held ___ the end of this month.
I’ll be free ___ seven o’clock.
We offered him our congratulations ___ his passing the college entrance exams.
In the dark street, there wasn’t a single person ___ she could turn for help.