Tom, clean up the broken glass _________ someone walks on it.
I received a letter, poor spelling made me think it was written by a child.
The new online library makes possible for students to choose books by smart phone off campus.
We were delayed at the airport.Otherwise,we here by lunch.
According to the latest study,most traffic accidents be prevented if drivers are careful enough.
He never complains about the difficulties he has in life. ,he always has ways to overcome them.