Multiple choice

His mouth was so swollen that he __________ hardly eat.

  1. can

  2. could

  3. should

  4. shall

  5. .

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

 Here, could is the correct option as it is used for expressing possibility. Can is used as a simple present participle, should is used for ought to, or must and shall as a modal verb is used for offering help or giving advice etc.