General question: What was happening in Moscow?
Special question: How was Moscow becoming an important city?
Disjunctive question: Was Moscow becoming an important city quickly or slowly?
Question to the subject: Who or what was becoming an important city?
Alternative question: Was Moscow becoming an important city or a small town?
General question: What was happening in Moscow?
Special question: How was Moscow becoming an important city?
Disjunctive question: Was Moscow becoming an important city quickly or slowly?
Question to the subject: Who or what was becoming an important city?
Alternative question: Was Moscow becoming an important city or a small town?