Answer:
Might be late, but here you go
Perplex:Confuse -> Baffle
Produced;Shaped -> Wrought
Knead;Work -> Kneaded
I think it was well written because the concept seems interesting in itself that people could go back in time or into the future. Albert Einstein has a better theory though
Answer:
hope it's help ;).........
Well, you need to give us the choices before we can give an exact answer but normally you can evaluate the tone by thinking about the context and meaning.
some examples of strong disapproval might be: "She's such a horrible person" or "I really hate this lamp it's ugly" The bolded words show the strong disapproval.
But most likely you should be able to find it by evaluating tone.
Answer:

Explanation:
Nancy only believes that her brother is in Paris. Even if he is in Paris or he is not, Nancy cannot know for sure.