common words – which one is correct?

Which spelling is correct? Press the button then
check to see if you’re right by pressing the Get answer! button.
Check the spelling carefully letter by letter.

1:   tommorrow      tomorrow      tomorow

2:   yessterday     yestterday     yesterday

3:   to day      today      tooday

4:     morning      morrning      mornning

5:    affternoon      afernoon     afternoon

6:   evening     evning     eevning 

7:    week end       weakend        weekend