engine

"The detective acted as the interrogator, asking the suspect detailed questions about the crime. "

"The locomotive chugged, pulling the train full of students to their school. "

"The graphic designer carefully prepared the mechanical for the company brochure. "

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

"The improvements in the student's math skills were noticeable after the extra tutoring sessions. "

"The responsible for the project is Maria. "

"The teacher emphasized that the considerable of student opinions about the new project was essential before making a decision. "

"The combustion of wood in the fireplace kept the room warm. "

"The old-fashioned egg beater was a clever contrivance for mixing ingredients. "

"Construction is underway on the new bridge."

"My brother will participate in the school's fundraising walk. "

"a mathematical problem"