Заполните пропуски, выбирая вариант а или б. 1. I am surprised at his not ... at the last lesson. a) answering b) having answered

I am surprised at his not answering at the last lesson. - Я удивлен тем, что он не ответил на последнем уроке.

I was surprised at his not answering at the last lesson. (Past Indefinite).

I am not surprised at his not answering at the last lesson.

I was not surprised at his not answering at the last lesson.

Am I surprised at his not answering at the last lesson?

Who is surprised at his not answering at the last lesson?

I am surprised at his not answering at the last lesson, are not I?