"Nature provides free lunch, only if we control our appetites." This is a powerful sentence. Nature cannot provide for a community that is taking faster than it can produce. Example, a mother with nine children cannot make them all lunch at once. Some will be served before others, and they will have to be patient. If all the children want seconds, the mother will be tired and may not be able to provide the second meal. Statistics from Webecoist state that, "Oxygen-starved dead zones that cannot sustain life now cover an area approximately the size of Oregon. Dead zones are caused by excess nitrogen from farm fertilizers, factory and vehicle emissions, sewage and other pollution runoff." Humans causing these large, and increasing, dead zones will cause an extreme depletion in sea life. These animals are dying due to human error.
Ex.1
1.many birds fly south in winter.
2. Ken writing a book about the Aztec Indians. He`ll finish it soon.
3. Mandy usually sits with Sandra in history classes. But today Sandra is absent, so Mandy will sit with Beth.
4. We don't wear uniforms to school.
5. “Great John! I see you are working very hard today! "
6. My brother doesn't listen to pop music, but today he listens to Madonna.
7. I don't understand what you are saying. Please speak more clearly!
8. I support Greenpeace because I believe in their philosophy.
9. Our teachers giving us a test twice a month.
10. "What are you doing?" "I taste the soup to see if it has enough salt."
Ex.2
1.Be careful! You will hurt yourself with scissors.
2. Come quickly! Look, snow out!
3. I do not know the answer, so I am looking it up.
4. The buses leave from the depot at 9 o'clock every day.
5. When I grow up, I will become an astronaut.
6. If you keep on play with this knife, you will cut yourself.
7. I will wear my new dress to the party tonight!
8. Jane will visit us these days and we are having a wonderful time together!
9. Don't worry! The plane will take off in three hours. We have a lots of time!
10. Jenny will be back soon. You could wait for her if you like.
Ex.3
1.My father took me to my first football game ten years ago.
2. When I arrive home, Susan cries.
3. Luke and Tony have a fight over Sheila at the pub last night.
4. I wrote an email when a dog comes in.
5. When I was young, my mum walk me to school every morning. In the afternoon my grandmother picked me up because my mother had to work.
6. While I driving to work, it startted snowing.
Ex.4
1. My father will take us to the park tomorrow.
2. Mary is doing her homework for tomorrow.
3. We live at 17 Burrows Street.
4. All day yesterday they were preparing for the English test.
5 . My mother worked in a good store before she was married.
6. We clean the house every day.
7. “Don't worry John, I'll pick up my dry cleaning on my way home. "
8. I will go to China if I win a lot of money.
9. My brother goes to school every morning.
10. When she was crossing the road, she was hit by a motorcycle.
11. When she arrives, we will ask her about it.
12. I will visit her while I am in Athens.
13. Ten minutes ago he took out the trash.
14. Do you get a lot of gifts for your birthday?
15. I will help with the laundry if I have time.
Ex.5
1.c
2.b
3.b
4.c
5.c
6.c
7.a
8.c
Объяснение: