1 Some children are singing "Happy Birthday". It's a birthday party.

Решение:

На основе предоставленного текста, можно ответить на вопросы:

1. What was the event? The event was a birthday party where children were singing "Happy Birthday".
2. What did the person do at the event? The children were singing "Happy Birthday".
3. Did the person like the event or not? The text doesn't explicitly state if the person liked the event, but the act of singing "Happy Birthday" suggests a celebratory and likely enjoyable occasion.

Ответ: 1. A birthday party where children were singing "Happy Birthday". 2. The children were singing "Happy Birthday". 3. The text implies it was an enjoyable event.