The monkey climbed up the tree.

She made a nasty comment about his appearance.

The bird built a nest in the tree.

The scientist acted as an observer during the experiment.

The occurrence of the event was unexpected.

I have a periodic meeting with my team every month.

She is physically fit and can run a marathon.

I need to replace the sparking plug in my car.

She is politically active and often participates in protests.

She always approaches challenges positively.