Столкнулась с тем, что начала путать past simple и past in the 15th century many different native tribes lived in america.a volcano destroyed pompeii in 79ad. это past simple и это вроде правильно.насколько я помню, past continuous это продолжающееся действие в в определённый момент. 15 век и 79 год н.э. - разве не определённые моменты? или век и год не учитываются? почему это не past continuous? ​

Lots of companies do business online. They sell goods and services, or provide INFORMATION to the general public. Doing business online is less EXPENSIVE and more convenient than running a traditional business, with offices and lots of employees. Surprisingly enough, there are lots of very young people among online businessmen. In spite of their age, they are quite SUCCESSFUL and professional. For example, Ben Collins started his own online company when he was REALLY young. He was only 17. He says, “My business is INTERNATIONAL - we work with people from different countries. In a real office, some people would NOT AGREE that someone of my age could be a boss, but when I work online, nobody cares how old I am.”

Susan’s father often had to go to different countries on business. That evening, he came home LATER than usual.
He looked tired. Susan KNEW that the next week her father was going to China to discuss a new project.
At dinner, her father asked Susan if she WANTED to go with him. It was a bit unexpected but Susan liked the idea at once.
It was her SIXTEENTH birthday in a few days.
And Susan thought it WILL BE fun to celebrate it abroad.
However, there was one thing she wanted to clear up before the trip: “Are you going to be busy from morning till night? I DONT WANT to sit in the hotel all the time alone.”
“You won’t have to,” her father reassured Susan. “I HAVE PREPARED all the project papers already. So, while our partners are studying them, we’ll have plenty of time for sightseeing.”
“Great!” Susan ran up to her room to pack.
“Remember to take some comfortable shoes. Otherwise your FEET will hurt after the long excursions.” Her father’s advice was always practical.
In half an hour everything WAS PACKED in a suitcase and Susan called her best friend to tell her the news.

This summer I spent with my grandmother in village. All the day I sit near rabbits. They need fresh green grass. So I’ll take it in the field and gave them. My rabbits more than happy and they grow big according to my help. The mom rabbit give me five small rabbits and I need to save them from the owl. That day owl flying near my small rabbits and want to eat them. Next day too. On the fifth day owl fly into forest and I never met she again. On the end of summer my grandmother thanks me and released me for Habarovsk. I spent few days in Habarovsk. One sunny day I walk quay. There are many ships and yachts near. What the nice view say my mother. So rest of the day we spent in quay. That was the nice summer holidays I ever spent.