Question

Fill in the blank with the most appropriate word.
How long ________ her?

• A. do you know
• B. you know
• C. you knew
• D. have you known

Answer 1

The correct option is D have you known

The correct answer is Option D,

HAVE YOU KNOWN is the past perfect tense. This means that the person was acquainted with her in the past but still knows her in the present. Thus the past perfect will be used.