Seeing a large crowd at the street corner，I became aware of     unusual happening．

___ who breaks the rules will be punished.

--- Which would you like, rice or noodles?--- _______is OK. I'm hungry.

He was very rude to the Customs officer, _____ of course made things even worse.                               

_________side of the street is lied with different shops, _________of which sell electronic products.