Put the verbs into the past perfect or the past perfect

Put the verbs into the past perfect or the past perfect continuous.
They _____________________________(travel) all night and were exhausted.
We _____________________________(book) our flight weeks before we left.
They __________________________(wait) for hours before their flight was announced.
Lionel _________________________ (already/be) to Nepal twice before he got married.
How long ____________________________(you/ look) for Jess before you found him?
The guide ___________(organise) everything well in advance, so our trip went smoothly.
They ___________________________(look forward) to this holiday for years before they finally managed to do it.
It ___________________________(snow) for hours and no plane were able to take off.