Ответ:
Affirmative: 1) 's; 2) 're
Negative: 1) 'm not; 2) isn't; 3) aren't
Questions: 1) Am; 2) Is; 3) Are.
Объяснение
1) I am writing a letter at this moment.
2) We were going to Spain at this moment last summer.
3) He is playing football at 5 o`cloc.
4) Listen! Somebody is knocking at the door.
<span>5) At this moment he is staying with my family in New York.</span>
I was reading books at 7 o’clock
I am reading books now
I will be reading books 2 till 3 p.m tomorrow
2) Yes, he is.
3)Yes, they are.
3)Yes, he is.
4)Yes, she is.
5)Yes, she is.