zouniaoqu
Hello! Why is it when I do the multiple choice part in the exercise section, some of the questions I am very sure I already checked/answered, become unchecked/unanswered when I submit them? Does this happen to everyone else? Thank you!
Posted on: Changing Class Time
January 21, 2011 at 11:31 AMHello! Why is it when I do the multiple choice part in the exercise section, some of the questions I am very sure I already checked/answered, become unchecked/unanswered when I submit them? Does this happen to everyone else? Thank you!