Помогите с 1 и 2 номерам

1.Today our class is going to a shelter for dogs and cats to look after stray animals.  2. before the world was a huge number of species, but every year some of which species are in danger of extinction 3.This year we are going to build an eco house made of wood with a light door and withou 4. This weekend I'm going to a birthday to a friend. I'm going to pack a gift. I do not when it does not. But I already bought a gift, obertnuyu paper, ribbons and various ornaments. Упражнение 1 было щас сделаю 2