Put the verbs in brackets into Present Perfect Simple or Present Perfect Continuous
1. Don't walk in here. I ….(just/clean) the floor.
2. Jane is hungry. She ….(not /eat) anything for six hours.
3. She is tired. She ….(study) for four hours.
4. I don't want to see that film again. I ….(see) it twice already.
5. Sandy ….(teach) English for 10 years.
6. Chris ….(not/do) the washing up yet.
7. He ….(walk) all the morning.
8. They.(play) in the garden for two hours.

Составить 4 во и 4 отрицательных предложения

1-a

2-a

3-c

4-b

5-a

yesterday i went th the park. i met my best friends there. it was sunny and frosty. we skied and skated in the park. we liked it very mach. we want to go to park next weekend, too.

the nobel prizes are annual international awards bestowed by scandinavian committees in  recognition of cultural and scientific ad¬vances. they were established by the swedish chemist alfred nobel, the inventor of dynamite. the prizes in physics, chemistry, psychology or medicine, literature and peace efforts were first awarded in 1901. the sveriges riksbank prize in economic sciences in  memory of nobel was instituted in 1968. although this is not technically a nobel prize, its announcements and presentations are made  along with other prizes. each nobel prize is widely regarded as the most  prestigious award in its field. each  laureate is presented with a gold medal, a di¬ploma and a sum of money which depends on the nobel founda¬tion’s income that year. the prize cannot be awarded  posthumously , nor may a prize be shared among more than  three people.