估(1 words)

Activity happen in the Olympic games from the beginning???
But you said ...it is not "opening ceremony"... hummm.....

如果你想講 activity.....then my guess is 傳遞奧運聖火吧?

you can say---->

"The Olympic Torch Relay"
OR
"Relay of the Olympic Flame"
OR
"Olympic Torch Relay Lighting Ceremony"
OR
"Olympic Lighting Ceremony"

however 你話係 1 word...... well..咁你就可以講 "Flame lighting/ Lighting" or "Torch relay/ Relay "

I'm not so sure....haha.....hope it will help anyway~

The correct answer should be "marathon"

Opening ceremonies

activities happen in the olympic games form the beginning:
Ceremony
or
Opening ceremonies