After school i have a lot of spare time.
The best way of training ur brain is to do difficult puzzles.
Taking photos is one of the popular hobbies.
Every one like reading exciting books.
This summer i'll go on a trip.
Riding a bike is very convenient way to make our body stronger.
1)They had been travelling all night and were exhausted. (all night - действие продолжалось какое-то время, и есть явный результат этого действия - they were exhausted, поэтому past perfect continuous)
2) We had booked our flight weeks before we left. (предшествующее действие (не продолжительное), оно произошло раньше (сначала забронировали билет на полет), а потом уже то, которое произошло после него (уже уехали). поэтому past perfect)
3) They had been waiting for hours before their flight was announced. (for hours указывает на продолжительное действие, поэтому past perfect continuous)
4) Lionel had already been to Nepal twice before he got married. (already - указывает на законченное действие, а не продолжительное, поэтому past perfect)
5) How long had you been looking for Jess before you found him? (how long - указывает на действие, которое совершалось в течение какого-то времени, поэтому past perfect continuous)
6) The guide had organised everything well in advance, so our trip went smoothly. (предшествующее действие, не продолжительное, поэтому past perfect)
7) They had been looking to this holiday for years before they finally managed to do it. (for years - указывает на действие, которое происходило в течение продолжительного периода времени, поэтому past perfect continuous)
8) It had been snowing for hours and no planes were able to take off. (for hours - указывает на продолжительное действие, поэтому past perfect continuous)