Question

Fill in the blank with a suitable option:
You _________ do your homework. If you don't, you'll fail the examination.

• A. Must
• B. Had to
• C. May
  
• D. Might

Answer 1

The correct option is A Must

The correct answer is Option A.

MUST expresses compulsion. In the given sentence, it is compulsory that he does his homework else he will fail the examination.

Thus MUST is the correct answer.

The remaining options are incorrect because:

HAD TO is the past tense.

MAY and MIGHT expresses possibility.