He was often asked where he had lea

He was often asked where he had learnt Russian.

Results (Russian) 1:

он часто спрашивали, где он выучил русский язык.

Results (Russian) 2:

Он часто спрашивает, где он узнал русский.

Results (Russian) 3:

Он часто спрашивает, где он узнал.