acquaintances

"My knowledge of history helped me understand the current political situation better. "

"My friendship with Sarah has lasted for many years. "

"My teacher explained the new math concept, and I understood it perfectly. "

"Are you suggesting that I killed my wife?"

"My brother regularly takes the bus to school. "

"My teacher fostered a classroom atmosphere of intimacy, encouraging students to share their ideas openly. "

"The school's new curriculum includes more hands-on science projects. "

"Originally, this paper was white, but over the years it has yellowed with age."

"I know of the man; but have no acquaintance with him."

"I think you should acquaint him with the realities of the situation."

"The students, collectively, decided to postpone the project until next week. "

"The guard blew his whistle to indicate imminent departure."