Почему царствование Александра II обернулось невиданным ранее политическим террором, неоднократными покушениями на «царя-освободителя» и, в конце концов, его гибелью?

1. Have you ever been to London?

2. Have you ever met his brother before?

3. Have you ever seen a bear?

4. Have you ever been the best in your class?

5. It's the funniest joke I've ever heard!                                                         

1. I've already bought it?

2. They have already done their homework.

3. I've already read this article.

4. They've already been to the cinema this week.

5. She's already passed her exam.                                                          

1. I've never been to London.

2. I've never met him before.

3. I've never seen a bear.

4. I've never been the best in my class.

5. I've never heard such a funny joke before.