Question

Choose an appropriate option to fill in the blank:

Bill and Sue go away on holiday very often, so they _____ be short of money.

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

Answer 1

The correct option is B can't

'Couldn't' indicates inability in the past.

'Can't' indicates impossibility at the present moment.

'Won't' indicates least possibility.

'Mustn't' indicates prohibition.

Here, the situation indicates an impossibility in the present time. Therefore, the correct option is B: can't.