8. I (spend) a day at the seaside. The sun (shine) brightly.
В данном предложении необходимо использовать Present Continuous для описания действий, происходящих в данный момент.
I (spend) a day at the seaside -> I am spending a day at the seaside.
The sun (shine) brightly -> The sun is shining brightly.
Составим предложение:
I am spending a day at the seaside. The sun is shining brightly.
Ответ: I am spending a day at the seaside. The sun is shining brightly.