Question

_____ did you visit Chennai

Answer 1

When

may be this is the answer

Answer 2

Ask a question - ___ did you visit Chennai?

Explanation:

• When did you visit Chennai? is the correct answer.

• 'When' is called the 'WH' question word.

• 'When' is used the places of asking questions about time, occasion, or a moment.

• In the given question, a time phrase has been used. So 'When' is used as a question word.
• Some other examples of 'when' as a question word are:

• When did he leave?

• When is your birthday?

• When did you wake up?