Были хулиганы, они хулиганили, но потом поняли, что это плохо
1. ii
2. our homes and the objects in them show how people used to live.
3. iii
4. The kitchen was used only for cooking.
5. NO
6. "... he writes about the servants who worked at those rooms."
7. iv, vi
8. The way the author makes history relevant.
Scientists have known about the greenhouse effect since 1824, when Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere.
The rapid rise in greenhouse gases is a problem because it is changing the climate faster than some living things may be able to adapt.
Also, a new and more unpredictable climate poses unique challenges to all life.
As the mercury rises, the climate can change in unexpected ways.
In addition to sea levels rising, weather can become more extreme.
1. The plates are clean. (wash up) - Someone must have washed them up.
2. There are some sandwiches on the kitchen table. Someone must have made them.
3. There are drops of water on the window outside. It must have rained.
4. He got only excellent marks at the exams. He must be a good student
5. She doesn’t even look in your direction. She must be angry with you.
6. Mary didn’t come to us yesterday. She must be ill.
7. The boy is smiling all the time. He must be reading something funny.
8. I shan’t bother you any longer. You must be tired.
9. I have never seen her so unbalanced. She must have been upset.
10. I found this baby bird at the foot of the tree. It must be fallen out of the nest.
11. Her eyes are swollen. She must have cried.
12. Fred left the office an hour ago. He must be at home now.
13. There is a tree right across the road. It must be blown down by the storm. 14. As soon as I switched my new electric cooker there was an explosion. There must be something wrong.
15. He promised to come at 5 but he didn’t. He must have forgotten his promise.
16. I didn’t hear the telephone. I must have fallen asleep.
17. He makes such mistakes! He must be very careless.
18. The taxi-driver got to the airport in half an hour. He must have driven very fast.
19. He never got the letter. It must have been sent to the wrong address.
20. The windows in the room are open. It must be stuffy inside.