They kept trying _____ they must have known it was hopeless.

 Nobody believed a 92-year-old man could run a marathon_______he passed the finishing line. People of all ages can challenge themselves.

________ he comes or not，the result will be the same.

Before the sales start, I make a list of ______ my kids will need for the coming season.

I can’t  tell you the exact time when I will get there, maybe at eight or at nine or still later._______, I’ll be  there as early as I can.