We gave our reports to the teacher(?)
He finished secondary scool last year(What?)
He left London for Moscow yesterday(When?)
Tanya entered Moscow University last year(Who?)
Visiting countries has been my dream for ages(Which?)
We have studied the culture and literature of foreign countries(What?)

Whom did we give our reports?

What did he finish last year?

When did he leave London for Moscow?

Who entered the Moscow University last year?

Which thing was my dream for ages?

What have we studied?