Ответ:
We decided to give our teacher a surprise for her birthday yesterday. The classroom 1...was cleaned... (clean) and nothing 2...was left... (leave) on the floor. Fresh flowers 3...were picked... (pick) and they 4...were placed... (place) on her desk. A "Happy Birthday" sign 5...was put... (put) on the door and a message 6...was written... (write) on the board. It said, "Dear Miss Graham, Have a great day! Love, Your pupils."