For the essays, you will will not be required to use the MLA format, or any other specific format, for that matter. You will simply need to incorporate what material is provided into your essay in a casual and fluid way. Here is an example:
If this is the provided material:
“I declare after all there is no enjoyment like reading! How much sooner one tires of any thing than of a book! -- When I have a house of my own, I shall be miserable if I have not an excellent library.”
― Jane Austen, Pride and Prejudice, pg. 28
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Your essay might look like this:
..... On the twenty-eighth page of her book "Pride and Prejudice," Jane Austen eloquently stated, "I declare after all there is no enjoyment like reading! How much sooner one tires of any thing than of a book! -- When I have a house of my own, I shall be miserable if I have not an excellent library.” This obviously shows that......
I also do not remember any question in the multiple-choice section requesting me to identify which specific style of citation was being used. However,
here is a site on styles of citation you may find helpful.
Good luck on your exam!!