The accident was seen by some people ___ at a bus stop.

حادثہ کچھ لوگوں نے دیکھا تھا___ بس اسٹاپ پر

waited

waiting

were waiting

None

Past continuous tense is used in this sentence.

waiting is the best to keep the meaning of the original sentence.

Here waiting is verb

Sh16-8-2023