initiating

"I had been working on the problem for weeks, and then I had a brainstorm and saw that the solution was easy."

"Graduation ceremonies mark the end of high school and the beginning of a new chapter. "

"Let me introduce you to my friends."

"The school's new initiative to reduce waste started with a recycling program. "

"He has memberships in clubs in three cities."

"My sister is very helpful, especially when it comes to organizing things. "

"We need some sort of principles to reason from."

"He received a mysterious phone call this morning."

"The teacher's instruct on fractions was very helpful. "

"The close bonds and mutual support within the group showed a strong sense of fraternity. "

"My younger brother loves playing basketball after school. "

"Before learning calculus, students must understand the rudiments of algebra. "