Помогите Put the verbs in brackets into the past perfect or

Помогите
Put the verbs in brackets into the past perfect or the past perfect continuous. 1.They (travel) all night and were exhausted. 2.We .(book) our flight weeks before we left. 3.They (wait) for hours before their flight was announced. 4.Lionel (already/be) to Nepal twice before he got married. 5.How long (you/book) for Jess before you found him? 6.The guide .(organise) everything well in advance, so our trip went smoothly. 7.They (look forward) to this holiday for years before they finally managed to do it 8.It (snow) for hours and no planes were able to take off.