My elder sister (has / have / had) opened a fast food restaurant in town.

has is your answer

I hope it helps

mate

I will always help you understanding your assignments

enjoy your day

#Captainpower \~

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.

its a hard situation i cant really answer because the essay is for you to write.