Are all these sentences grammatically correct? I'm Italian and I'm studying English... Can you help me, please?

In the first sentence all you need is a comma after 'worthwhile'. In the second, the participle refers to the wrong subject. The in-flight movie can't be tired; it's Rose and Mr Harris who are tired.

It should read: The in-flight movie about the Civil War distracted Rose and Mr. Harris, tired from a heavy schedule, as they flew to Seattle. In the third, you should say 'As we examined the map, our mistake became obvious and would need correcting before WE TRAVELLED further'.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.