Могло ли быть?
1)у Ивана 3 была богатая библиотека.
2)в сокровище Ивана 3 хоронилась шапка Мономаха.
3)к пристани Москвы реки причаливали большие морские суда из Португалии и Испании.
4)из сочинений иностранных авторов о Москве времен Ивана 3.
5)в Москву за товарами приезжали купцы из других русских городов.

Найти глаголы употрёблённые в Present Perfect Progressive.

Misha: What's wrong with you, Mark? You look pale and your eyes are red. Have you been crying? Mark: Of course, not. I have been surfing the net all night. Misha: What have you been looking for? Mark: I have been looking for the MacWizards' family history book. Misha: Oh no, not again. How can you find it on the Internet? Mark: Of course, I can't find the book. There is only one book and we've lost it. But I found the second part of the story about the Normans and Elmer. Misha: Really? Tell me all about it! Mark: I went to the Senate House Library website. They have a lot of old books and manuscripts there. I put the key words of the story into their search engine and... I found a copy of our story in the library. A hundred years ago my great-grandfather gave some copies of our family manuscripts to