Past Perfect Continuous Tense

My grandfather ___ in his old house for ages before he moved in with us.

I ___ with my problem for weeks before I found a solution.

We ___ in the rain since midday, so we were very wet.

The students ___ for their excursion for months.

We ___ to find some water for days.

Andrew ___ as an assistant manager before he was promoted.

Keyla _______ _________ ________ for two hours before she arrived.

Priscilla _______ _______ __________ information about an accident for two days, when the thief stole her notes.

The staff _______ ___________ ___________ lunch for the special guests since 8 a.m.

Bruno and Marcela met at a medical assembly, which Marcela ______ _______ ________ for a long time.