At 8 o'clock yesterday I ( had _ was having-had had -have) dinner with Mark.​

was having/had

Explanation:

it depends on the context outside of it to. For example if you were telling a story and that was a detail it would be "was having" but any other context would be "had"

the sample answer on e2020

conflicting values are demonstrated between two different groups in animal farm. first, the farm animals value hard work. this is shown by them working late and working long hours at the request of the pigs. napoleon and the pigs, however, sleep late daily. furthermore, the animals value equality. this differs from the value of napoleon and the other pigs. instead of equality, they value only gaining power and maintaining their own privilege, which is demonstrated by their taking extra milk and sleeping in beds.

delfino 2: diez in the desert analysis: the story, delfino 2: diez in the desert was really about not giving up! that is basically the theme of the story, and also being more prepared. the plot of the story was about diez, the main character, traveling through the harsh desert with other immigrants. also, that keeping the group alive and getting them to their final destination. the setting of the story took place in mexico in the harsh desert.