True style is the distinctive way a writer uses language
Yes it is a metaphor because he does not literally have a key to her heart. It is just figurative speaking.
The writer's beliefs about life
This is true..what's the question lol
They will ask you simple questions like identify the noun and pronouns in the sentence, and they will ask you intermediate questions for your grade lvl and then hard. If your doing a computer test, if you get the simple question right, you will receive a more advanced question next. If you get it wrong, they will give you a question at the same level as the one you just answered but got wrong. :) Goodluck on your exam. ;)