Respuesta:
1. She played basketball yesterday at five o'clock.
She didn't play basketball yesterday at five o'clock.
Did she play basketball yesterday at five o'clock?
2. We studied hard yesterday afternoon.
We didn't study hard yesterday afternoon.
Did we study hard yesterday afternoon?
3. They watched TV when I arrived.
They didn't watch TV when I arrived.
Did they watch TV when I arrived?
4. They smoked yesterday in the morning.
They didn't smoke yesterday in the morning.
Did they smoke yesterday in the morning?...