Fill in the blank with the most suitable option:
To keep fit and stay healthy, you ____________ enough of the right kinds of exercise.
A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words.
Option A is correct as the sentence indicates the necessity. Therefore, have to take must be used here.
The other options are wrong as no other tense can be used here.
The correct answer is A) have to take