My sister usually reads books before bed, but today she _______ a film.
Correct answer: A
The present simple is used in the first sentence to express habits in the present, combined with the adverb of frequency “usually”. The present continuous is used in the second sentence to describe an action occurring in the present that is temporary in nature, different from the usual rules or habits. The verb to-be in the third person singular “my sister” is “is”.
Translation: My sister usually reads a book before going to bed, but today she is watching a movie.