The English language teacher must make his students learn and make questions.
In regular classes students often have got to answer questions. Yet, they must practice asking questions in the various verbal tenses.
They can ask the teacher, they can ask their classmates. Otherwise they would learn the affirmative and negative sentences but they would never learn or practice asking.
You could try next class and let us know about your experience. / Photo from: US Navy Air Traffic Controller aboard the Nimitz class air commons wikimedia org