Exercise 6. Put the verbs in brackets into the correct tense 1. The students (talk) when the teacher (come) in, but they (stop) at once when the teacher (speak). 2. He (walk) across the room and (begin) to write questions on the blackboard. 3. While he (write) the questions, the students (take) out their pens and (prepare) themselves for the test, 4. The teacher (finish) writing, sit down in front of the class and (open) a book. 5. He (read) the book the whole time while his students (answer) the questions. 6. When the bell (ring) at 4 o'clock, most of them (write) still. 7. The teacher (tell) them to stop writing and he (collect) their papers. 8. When they (leave) the room, he (begin) to correct the papers.