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.
The students (were talking) excitedly when the teacher (came) in, but they (stopped) at once when the teacher (spoke).
2. He (walked) across the room and (began) to write question on the blackboard.
3. While he (was writing), the students (sat) down, (took) out their pens and (prepared) themselves for the test.
4. The teacher (finished) writing, (sat) down in front of class and (opened) a book.
5. He (was reading) his book the whole time while the students (were answering) the questions.
6. When the bell (rang) at four o’clock, most of them (were still writing).
7. The teacher (told) them to stop working and he (collected) their answer papers.
Объяснение: