Bonjour Angela,

I am sorry to hear you've had difficulties with this exercise. As Ann mentioned, using the dictionary before and during the exercise can be very useful. There is also a link to the vocabulary list on Harry Potter, which is included and highlighted just before starting the test. You can open it before starting the exercise to help you with any Harry Potter related terms (I know I would, not having read the books or seen the films ; not my cup of tea!). 

I hope this is helpful.

Bonne journée !