A
1. She works here since last year
2. Mike hasn't arrived yet
3. We went to London last year
4. The party was exciting
5. They were tired
6. He already finished when his brother called him
7. If she didn't have a headache she world do homework yesterday
8. I wish it was summer now
9. If only we had known him last year
10. Sam was to Minsk twice
B
1. Floods are common in the countries when it rains heavily
2. In poor countries child labor is a big problem
3. This area suffers from tornados
4. The beach is very polluted
5. The survival of endangered species depends on us
6. You can make a donation to help animals
7. Scientists monitor animals in their habitat
8. He has just won a peace award
