Question: 4 _________ your mother work in a bank?
Answer: Does your mother work in a bank?
Explanation: This is a simple present tense question. The subject is "your mother", which is singular and can be replaced with "she". For the third person singular (he, she, it) in the present simple, we use "does" to form the question.
Translation in Russian:
Твоя мама работает в банке?