Question

Choose a suitable modal auxiliary to complete the sentence:

It rained every day during their holiday, so they ______ have a very nice time.

• A. couldn't
• B. can't
• C. won't
• D. mustn't

Answer 1

The correct option is A couldn't

'Couldn't' indicates inability in the past.

'Can't' indicates impossibility in the present.

'Won't' indicates least possibility.

'Mustn't' indicates prohibition.

Here, inability to have a nice time in the past (during the holiday) is indicated. Therefore, the correct option is A: couldn't.