If they ...... by tomorrow, I...... the box office

Відповідь:

Виконано.

Пояснення:

   If they don't arrive by tomorrow, I will close the box office.

   If they do arrive by tomorrow, I will open the box office.

   If they pay by tomorrow, I will reserve their tickets at the box office.

   If they cancel by tomorrow, I will refund their purchase at the box office.