Ben,do you know who cooked food ____ in this restaurant（one）?

Ben,do you know who cooked food ____ in this restaurant（one）?
Ben,do you know who cooked food ____ in this restaurant（one）?

Ben,do you know who cooked food ____ in this restaurant（one）?
first

要根据你的整个课文，要填过去时间，如昨天或去年