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 teacher's questions for an hour already. (How long) 3. Alex's 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)

The boys usually keep regular hours. (What) - What do the boys usually keep? A first-years student has been answering the teacher's questions for an hour already. (How long) - How long has a first-year students been answering the teacher's questions. Alex's fellow-student had read the book before the seminar began last week. (When) - When had Alex's fellow-student read the book? Laboratory assistants equipped a new complicated experiment last week. (What kind of ...) - What kind of experiment did the laboratory assistants equip last week? Researchers will meet at the scientific conference next month. (Where) - Where will researchers meet next month?