Take part in the event.

参加这个活动。

Take photos of the event.

拍活动的照片。

He will observe the event.

他会观察这个事件。

The event will start soon.

活动很快就要开始了。

It was the eve of the event.

那是活动的前夕。

The event was very exciting.

这个活动非常激动人心。

I will take part in the event.

我会参加这个活动。

They participate in the event.

他们参加了活动。

The event will take place here.

活动将在这里举行。

They will participate in the event.

他们将参加这个活动。