Multiple choice softskills communication

I missed the train, so I ________ take the one after.

  1. must had

  2. must to

  3. had to

  4. didn't have to

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

'Had to' is the past form of 'must' and expresses past obligation or necessity. 'Must had' and 'must to' are grammatically incorrect. 'Didn't have to' would mean there was no obligation, which doesn't fit the context where the speaker needed to take the next train.