Choose the correct negative sentence in present perfect. she has not washing her favourite skirt herself. she has not washed her favourite skirt herself. she have not washed her favourite skirt herself. his mother has so far not made dinner. his mother have not made dinner so far. his mother has not made dinner so far. the kids has not read the comics yet. the kids yet have not read the comics. the kids have not read the comics yet. they has not used a touchscreen phone so far. they have not use a touchscreen phone so far. they have not used a touchscreen phone so far.

Many wildlife habitats will be destroyed if man keeps polluting the environment.
2. If we dump all sorts of chemicals into rivers, we will not be able to swim in them in the future.
3. If we do not stop cutting down so many trees, we will endanger our oxygen supply.
4. Soon the Earth’s resources will be exhausted if the human population continues to grow.
5. If everybody continues to use aerosols and CFCs, the hole in the ozone layer will get bigger.
6. If the sun radiation can’t escape into space, Earth’s temperature will increase steadily.
7. If the global temperature rises, sea levels will rise too.
8. We’ll threaten our own existence if we do not cut down on waste rapidly.
9. People will run out of drinking water one day if they do not use it more rationally.
10. If he wants to help the planet, then he has to change his habits

My birthday is on the 14th of July.I always have a birthday party. My friends and I  usually gather in our house or go to a cafe. Sometimes we have a picnic with our relatives. We always prepare something funny for it: I think about competitions and surprises for my guests. We listen to music, sing, dance and have fun. I think that the party is good if you've prepared everything for the party beforehand.
Мой день рождения 4 июля.У меня всегда бывает праздник в день рождения. Я и мои друзья обычно собираемся в нашем доме или идём в кафе. Иногда мы с родственниками едим на пикник. Мы всегда готовим что-нибудь смешное: я думаю про конкурсы и сюрпризы для гостей. Мы слушаем музыку, поём, танцуем и веселимся. Я думаю,