Для тех, кто шарит в английском... ^^нужна помощь!!!

Мне тут нужно английский сделать, а я не понимаю как задовать воаросы (больная тема). =))
Я тут вам напишу их, а вы проверьте пожалуйста, а если не правильно, можете исправить?
Огромное спасибо зарание... =)))
(тут нужно задовать вопросы на предложение... я их вам напишу и напишу к ним вопросы)

1..-Scientists believe that it happened between 50 000 and 20 000 BC,when there was a land bridge across the Bering Sea.
(?).-When did this happened?

2.(предл) Over thousand of year they slowly moved on and on,looking for food.
(?)What did they looking for?

3.The land bridge between Asia and America dissapeared under the ocean.
(вопроса нету)

4.They spoke about 300 different languages and their way of life was different,too.
(?)How many lenguage did they have?

5.The tribes moved from one place to another every season and when they met each other,they were usualy friendly.They exchanged goods and shared ideas.
(?)What did they do when they met?

6.The settlers wanted to own land and become rich.
(?)What did the settlers want?

7.They killed thousands of buffalos to get only the tonque of each animal.
(?)How many buffalos did they kill?

8.The settlers drove Indian tribes away from their homelands.
(?)What did the settlers do?

9.The jorneys to the new areas were long and hard.
(вопроса нету)

Очень надеюсь на вашу помощь... =))