Ответ:

1.A 2.B 3.A 4. B 5.A 6. A. 7. B. 8. A

1.The lesson hasn't started yet

2.The teacher has already written the hometask on the board

3. Joe and Tim has just come into the classroom

4. Tony hasn't finished getting his books ready.

5. Cristine has already opened her book

6. Dave has dropped his pen on the floor

7. He hasn't picked up it yet

Объяснение: