Question

We were preparing/prepared for the test at 9 p.m. yestarday afternoon.​

Answer 1

Ответ:

Preparing правильный выбор

Answer 2

The correct phrasing would be: "We were preparing for the test at 9 p.m. yesterday evening."

The verb "were preparing" indicates that the action of preparing for the test was happening in the past. The phrase "yesterday evening" is more appropriate to refer to the time period after noon and before night. "Yesterday afternoon" typically refers to the time period after noon and before evening. However, since you mentioned 9 p.m., it is more accurate to use "yesterday evening" to indicate the later time.