Select the most appropriate Modal to be filled in the blank in the sentence given below:

I ________ visit my friend daily when she was in the hospital.

used to

The correct answer is Option (2) - used to

The sentence refers to a past habit (visiting a friend daily when she was in the hospital). The correct modal verb for expressing a repeated action in the past is "used to."

 "I used to visit my friend daily when she was in the hospital."

• This indicates that visiting the friend was a regular activity in the past but is no longer happening.

OTHER OPTIONS

 "can" → Incorrect

• "Can" expresses present ability, but the sentence refers to a past habit.
• Example: I can visit my friend tomorrow.

 "should" → Incorrect

• "Should" expresses advice or obligation, not a past habit.
• Example: I should visit my friend more often.

 "could" → Incorrect

• "Could" expresses past ability or permission, but it does not convey a regular habit like "used to."
• Example: I could visit my friend if I had time.

 "I used to visit my friend daily when she was in the hospital."