Fill in the gaps with one of the question words from the list. who, what, which, where, how long, when, what time, how often, how, whose 1 .. is this bag? my sister's. 2 the children? at school. 3 paul coming back? tomorrow. 4 he drive? very dangerously. 5 that woman? mary smith. 6 you finish work? at four o'clock. 7 they buy a newspaper? every day. 8 is her name? catherine. 9 do you like best? rome or milan? 10 you been a teacher? since 1991.

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Protect the environment from industrial pollution .Keep the land, air and water clean.Keep our environment clean. All woods are home for animals. So behave as guests. Help nature. Protect it. Тhe Earth is our home.Don,t pollute it. When you hike, leave the place clean. Plant a tree to create home for birds, squirrels and other small animals.
it's not too late to solve these problems. We have the time, the money and even the technology to make our planet a better, cleaner and safer place. We can plant trees and create parks for endangered species. We can recycle litter. We can support green parties and put pressure on those in power. Together we can save the planet and all of us with it.

1)If my friend comes to see me, I will very glad.
2)If my mother buys a cake, we will have a very nice teaparty.
3)If we receive a telegram from him, we will won't worry.
4)If you don't work systematically, you will fail the exams.
5)If you are busy, I will leave you alone.
6)If I live in Moscow, I will visit the Trtyakov Gallery every gay.
7)If I get a ticket, I will go to the concert.
8)If we live near a wood, We will gather a lot of mushrooms.
9)If my father returns early, we will wath TV together.
10)If she knows English, She will try to enter the uneversity.