Ответ:
1) My friend was arriving while I was doing homework.
Мой друг приезжал, когда / в то время как я делал домашнее задание.
2) The teacher was talking to us when bell rang.
Учитель разговаривал с нами, когда прозвенел звонок.
3) My dad turned off the TV when we were watching "House".
Мой отец выключил телевизор, когда мы смотрели сериал "Хаус".
4) My friends were playing chess when we arrived.
Мои друзья играли в шахматы, когда мы приехали.
(или Когда мы приехали, мои друзья играли в шахматы)
5) I was listening to music when my brother phoned.
Я слушал музыку, когда позвонил мой брат.
или
I was listening to music while my brother was phoning.
Я слушал музыку, когда / в то время как мой брат звонил по телефону.
Объяснение:
...the United States of America.
... North America.
... 9826675 km²
... a large territory...from the Atlantic Ocean to the Pacific Ocean.
... Alaska and Hawaii.
... Canada and Mexico.
... 50 states and 1 district.
... Washington.
... New York, Los Angeles and Chicago.
... 325719178.
... Denali and Mount Saint Elias.
... Missouri and Mississippi.
... copper, oil, iron ore, coal, aircraft, cars, textiles, TV sets, armament, furniture and etc.
... the world's fouth lagest country.
... the President.
... Congress.
... Supreme Court.
1.Have you worked.
3.Have played.
4.Have lost.
2.Have used.
I think that the school of years through 10 will be very good and prestigious. The dining room will be looks as cafe children will work only with computers