Question

Helppp. Exercițiu 1​

Answer 1

Why Past Perfect here?

The niece had entered her collection of cuddly toys before the exhibition was opened, which is a complete action in the past (that happened before another action in the past).

Did he still collect them (at the time of the exhibition)?

No, he had collected them until the exhibition, which is again, a complete action in the past.

When? Before or after the exhibiton?

Before the exhibition, because it is an action that happened before another one (in this case, the exhibition) in the past.