When....... your brother come beck to Moscow? A.) has B.) did C.) do

Question

When....... your brother come beck to Moscow?

A.) has

B.) did

C.) do

Answer 1

010101010100101010010101001010101010
наверно b 

Answer 2

When did your brother come back to Moscow?

Правильно В.

Слово back пишется через a.)