Задайте вопросы к предложениям, начиная их словами в скобках:1. The boys

Задайте вопросы к предложениям, начиная их словами в скобках:
1. The boys usually keep regular hours. (What) 2. A first-years student has been answering the teachers questions for an hour already. (How long) 3. Alexs fellow-student had read the book before the seminar began last week. (When) 4. Laboratory assistants equipped a new complicated experiment last week. (What kind of) 5. Researchers will meet at the scientific conference next month. (Where)