Fill in: at, on, in. It is in the auditorium next to the headteacher's office, 1) .......... 21st May 2) .......... 7.30 3) ............. the evening.

Here's the answer:

1. It is in the auditorium next to the headteacher's office, at
2. 21st May on
3. In the evening.

Translation:

1. Это в актовом зале рядом с кабинетом директора, в
2. 21 мая в
3. Вечером.