preparative

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The school's fundraising project aims to renovate the library in several stages. "

"The musicians held a jam session in the park, playing improvised jazz tunes. "

"The preparation for the history test took her several hours. "

"The preparatory exercises for the upcoming math test helped students become more confident. "

"My daughter's teacher is very kind and helpful. "

"My discussion with the professor was very enlightening."

"The preliminary schedule for the school trip was posted today, giving us an introduction to the upcoming activities. "

"Our team is brainstorming ideas for the new marketing campaign. "

"A secure supply of crude oil is crucial for any modern nation, let alone a superpower."

"The teacher announced that there would be no school tomorrow due to the snow. "

"Chemists used chromatography to separate the different colored dyes in the marker ink. "