Answer:
A. shall
Explanation:
- While CAN, COULD, MAY, MIGHT, MUST, SHALL, SHOULD, WILL and WOULD are pure modals, HAVE TO and OUGHT TO are semi-modals.
Example:
I think I will go to a movie tonight.
- This sentence is in simple future tense and the form is 'will or shall + base form. ' Here, decision in the present decides an action in the future.
- So, nor and yet are NOT modals.
