extemporize

"The apéritifs were particularly stimulating."

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

"The pianist played an impromptu during the family gathering, creating a cheerful atmosphere. "

"It took him only twenty minutes to perform the task."

"The architect planned the building for the client."

"He made a spontaneous offer of help."

"The teacher used the microphone to project her voice clearly to all the students in the large classroom. "

"He had no speech prepared, so he improvised."

"The speaking portion of the exam made me nervous. "

"The meeting ended unexpectedly early, leaving us with extra time before dinner. "

"She told him the machine was poorly built, but they both knew that she was the one who had malfunctioned."

"The school is located just outside the town, without the main shopping area. "