3 you / to London (?) 4 they / on a package holiday (?)
5 John and Julie / to Australia (ⓇO)
6 1/ on an adventure holiday (X)
7 Our parents / to Florida (m)
8 you / to an IMAX cinema (?)
9 We / hiking in the mountains (m)
10 your cousins / to your new house (?)​

Nature is a beautiful world that surrounds a person. These are mountains, fields, forests, rivers, lakes. Nature gives people shelter, food and clothing, this is the air they breathe. Not to take care of nature means not to take care of yourself and your loved ones. Currently, a huge problem of humanity is an ecological catastrophe on earth. There is a daily pollution of rivers, seas and oceans by industrial and industrial waste, air by caustic fuel of motor vehicles. Hectares of forest are constantly being cut down, animals and birds are being exterminated at the hands of poachers, fish are dying from toxic emissions of enterprises into reservoirs. Everyone should think about how to preserve nature, how to preserve it for future generations of people. To constantly admire the beauty of natural resources, you need to burn bonfires, store garbage only in designated places. Do not break twigs, do not tear off leaves of trees unnecessarily, do not ruin bird nests and anthills In order to prevent the elimination of all living things on the planet, it is necessary for everyone, even the head of a country, an enterprise, even a simple citizen, a schoolboy, to understand his place in life, that only by treating nature and others with love, carefully protecting them, it is possible to preserve the human race on earth and save it from imminent death

Объяснение:

ну тут не 8-10 но пойдёт

1. When the boy got to the village, it was getting dark and the wind was blowing.
2. When the boys met at last they he discovered that they had lost their interest in the collecting of stamps.
3. By the 2nd of October last year he had been studying English for a years.
4. Several weeks ago my uncle built a new house.
5. I was sitting at the table and writing when be came.
6. Did you have lessons every day last week?
7. He was resting in his room when his mother came.
8. After the boys had travelled in the Caucasus they decided to make a sea voyage.
9. Among the familiar names I discovered the name which had been filling my mind for several days.
10. When we entered the room Boris was sitting at the table he had been working at his report since early in the morning.
11. He was slowly moving on when he met his friend.
12. Yesterday the teacher told us a short story.
13. When our parents went to the theatre we were playing computer games.
14. Yesterday at 2 we were helping our grandparents.
15. By the end of the month they will have  finished all their work.
16. They had been waiting for their friend for 2 hours before he arrived.