А кто автор?
Там в самом начале написано кто Автор
<span>Who is at the office? - Кто в офисе?
Предлог at - в, на, у, при, к
</span>
1....we will see them at the party
2.Andrew's brother have gone (went) to the library three times the month.
2, 4, 5, 7, 9, 10, 12, 14