His business failure left him at the edge of desperation, but, , he managed to go out of the shadow through years of efforts.

The question is _____ we can finish our work _____ tomorrow evening. [ ]

The cat with a white tail isn’t _______. I think it belongs to _______.

His son has poor eyesight because he plays _______ computer games.

There is ______ “u” and ______ “s” in the word “Sue”.