5. ......... he live in Samara now?

Step-by-step solution:

1. The sentence is a question in the present simple tense.
2. The subject is "he", and the main verb is "live".
3. For third-person singular subjects (he, she, it) in the present simple, we use the auxiliary verb "Does" followed by the base form of the main verb.

Answer: Does he live in Samara now?